Honeywell 7800 Series Product Data
Honeywell 7800 Series Product Data

Honeywell 7800 Series Product Data

4-line lcd keyboard display module
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7800 SERIES
S7800A2142 4-Line LCD
Keyboard Display Module
APPLICATION
The S7800A2142 Keyboard Display Module
(KDM) provides current system status along
with first-out annunciation and system
diagnosis using a five-row by 64 column
readout (Main screen shows 4 rows of text
for better long-distance legibility, all other
screens show 5 rows of text). The KDM
provides local or remote annunciation of
operation and fault information, remote
reset, report generation, burner control data
and diagnostic information. The KDM is
part of the 7800 SERIES of microprocessor-
based burner controls for gas, oil, coal
or combination fuel single burner
applications.
The 7800 SERIES is programmed to provide
a level of safety, functional capabilities
and features beyond the capacity of
conventional controls.
Contents
The S7800A2142 is required to program
the Valve Proving feature of selected 7800
Series devices.
The S7800A2142 KDM offers the following
technical advancements to the 7800
SERIES devices:
• Compatible with installed Honeywell
7800 SERIES systems.
• When used with the new 7800 SERIES
with Valve Proving Feature, the KDM
allows for programming the Valve
Proving Control feature and timing (Pass
Code protected feature).
• When used with the new 7800 SERIES
with Postpurge feature, the KDM allows
for programming the Postpurge time
(Pass Code protected feature).
• Allows for naming the S7830 Expanded
Annunciator terminals to match your
system drawings. (Displayed message
only.) (Pass Code protected feature.)
• An eight line (available by scrolling)
by twenty column readout set of "Call
Service" (Business Card) alpha/numeric
directions can be displayed instead of the
standard lockout display message. (Pass
Code protected feature).
• Enable ModBus communication feature.
• Configure language for English, Spanish,
or French.
• On-line troubleshooting guide.
2
2
3
5
10
28
PRODUCT DATA
32-00110-07
43
48
50
51

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Table of Contents
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Summary of Contents for Honeywell 7800 Series

  • Page 1: Table Of Contents

    7800 SERIES devices: • Compatible with installed Honeywell 7800 SERIES systems. • When used with the new 7800 SERIES with Valve Proving Feature, the KDM allows for programming the Valve Proving Control feature and timing (Pass Code protected feature).
  • Page 2: Features

    • Symbols (!, @, #, $,%, etc.). • Valve Proving time Programming can be done with the S7800 • Software revision and version of 7800 KDM mounted on a 7800 SERIES Relay SERIES. Module or with a 13 Vdc power source • Relay Module and KDM.
  • Page 3: Installation

    7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module EN60730: For compliance with remote Disconnect the power supply before beginning installation to prevent KDM mounting require- ments, provide electrical shock and equipment electrical insulation separation by damage. More than one power insulation using double or reinforced supply disconnect can be involved.
  • Page 4 KDM to secure it to the 7800 SERIES Weather Relay Module. The S7800A is not designed to be weather 3.
  • Page 5: Wiring

    7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module 1. Use the 203765 Remote Display Recom- Mounting Bracket as a template to mark Recommend- mended Application the four screw locations. ed Wire Size Part Num- 2. Drill the pilot holes for the four mounting screws.
  • Page 6 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module (b) Remote Reset leadwires: The S7810 DATA CONTROLBUS MODULEª (MOUNTED ON 7800 SERIES RELAY MODULE) maximum length wire is 1000 ft (300m) to a Remote Reset push- MOMENTARY PUSH BUTTON button. SWITCH 8. Install all electrical connectors.
  • Page 7 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module MOMENTARY PC/PLC PUSHBUTTON RS-485 SWITCH RM78xx SERIES DEVICE WITH S7800 SERIES 5 OR GREATER DISPLAY. MOMENTARY PUSHBUTTON SWITCH RM78xx SERIES DEVICE WITH S7800 SERIES 5 OR GREATER DISPLAY. MULTI-DROP RS-485 COMMUNICATION BUS. UP TO 31 S7800 SERIES 5 OR GREATER DISPLAYS CAN BE CONNECTED TO A SINGLE BUS WITHOUT AN RS-485 REPEATER.
  • Page 8 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module doesn’t make sense for the button action, selecting the button is ignored. KEYBOARD BUTTONS Fig. 6. Keyboard buttons. Fig. 5. S7800 Keyboard Display Module Page Structure Keyboard Functions The Home and Lockout pages display text The keyboard contains six push-buttons using a larger font size than all other pages that are used to navigate on each page and...
  • Page 9 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Home Page GO TO LOCKOUT The Home page is the main status page DETAIL 4 LINES that displays primary status of the burner control operation (see Fig. 11). This page is intended to be the primary one displayed Fig.
  • Page 10: Troubleshooting

    Self-diagnostics of the 7800 SERIES enables it to detect and annunciate both external and internal system problems. Internal faults and external faults such as interlock failures, flame failures and false flame signals are annunciated by the KDM via the 7800 SERIES Relay Module.
  • Page 11 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Sequence Status The Keyboard Display Module (KDM) indicates the burner status, INITIATE, a stabilization period for the relay module to check for any fluctuations in ac line INITIATE mm:ss voltage inputs or control inputs on power up or during normal operation. The timing of the INITIATE period is either two seconds or ten seconds, depending on the model, before entering STANDBY.
  • Page 12 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Sequence Status The KDM indicates the burner status and that the Low Fire Switch is jumpered. PURGE HOLD: The Low Fire Switch is bypassed, welded or otherwise prematurely closed. The T18 (Low Fire system automatically adds 30 seconds to allow the firing rate motor addition- Switch Jum- al drive time to reach or near the closed damper position before starting the...
  • Page 13 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module The S7800 provides diagnostic information to aid the service mechanic in obtaining information when troubleshooting the system. See Table 4 for information on accessing historical and diagnostic selectable messages. Information available in the Diagnostic Information includes Device Type, Software Revision, Manufacturing Code, Flame Amplifier Type, Flame Failure Response Time (FFRT), Selectable Jumper Configuration Status, Run/ Test Switch Status and Terminal Status.
  • Page 14 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module The Faults navigation bar contains the following commands that can be selected using the right and left arrow buttons: • “Prev fault” – go to previous fault code • “Exit” - exit Faults section and return back to Troubleshooting guide menu •...
  • Page 15 Lockout Messages When the 7800 SERIES is locked out, a standard lockout message is displayed unless the Call for Service feature is enabled. When the Call for Service feature is enabled a custom lockout message is displayed instead. The standard lockout message (see Fig. 22) is...
  • Page 16 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module editing a parameter on a page. In this case the lockout message waits until the user is done editing and exits the page. FAULT CODE GO TO LOCKOUT DETAIL DESCRIPTION STATE AT TIME OF FAULT Fig.
  • Page 17 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fig. 25. Troubleshooting guide When the Call for Service feature is enabled a custom message up to 8 lines is displayed instead of the standard lockout message (see Fig. 26 for an example). Only 4 lines of the custom message are displayed at a time;...
  • Page 18 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Fault 2 *AC Excess noise or device Frequen/ running on slow AC. Noise* Check the relay module and display module connections. Fault 3 *AC AC line dropout de- Reset and sequence the relay module. Line Drop- tected.
  • Page 19 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Fault 12 Lockout Interlock pow- *Lockout ILK ered at improper point in sequence. Fault 13 Combustion airflow *Airflow Sw. interlock fault during STANDBY. Check wiring and correct any errors. Reset and sequence the relay module.
  • Page 20 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Inspect the main fuel valve(s) and connection(s). Flame was lost during Fault 19 Make sure that the fuel pressure is high enough to supply fuel MFEP or the first 10 *Main Flame to the combustion chamber.
  • Page 21 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Start Switch held on too long. Check wiring; verify that Start Switch is correctly connected. Make sure that the Start Switch is functioning properly and Start Switch was on Fault 27 that the switch contacts are free of contaminants.
  • Page 22 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Check wiring; correct any errors. Inspect the fan; make sure there is no blockage of the air intake and it is supplying air. Make sure the Airflow Interlock Switches are working properly and all switch contacts are free of contaminants.
  • Page 23 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Check wiring; correct any errors. Reset and sequence the relay module. Use either the manual motor position to drive the motor to the Low Fire position, or use the Run/Test Switch option, if available.
  • Page 24 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure The sequence logic detected a combination of jumpers that is illegal Inspect the jumpers and refer to the installation instructions for the sequence e.g., Fault 50 for compatible jumper configurations. if it is correct to clip *Jumpers Make sure that clipped jumpers are completely removed.
  • Page 25 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Inspect the Prepurge Fan Switch terminal 18 and the connec- Fault 57 Purge Fan Switch is off tions. *Purge Fan when it should be on Make sure the switch is working properly. Reset and sequence Sw.
  • Page 26 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Flame Indication Fault 75 Remove wire to terminal 21 and reset relay module. Feedback (terminal 21) *Flame If the fault persists, replace relay module. either on when it should Proven Feed- Reconnect wire to terminal 21.
  • Page 27 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Code System Failure Fault 103 Postpurge configu- *Postpurge ration in EEPROM Enter Setup and re-commission Postpurge settings. EEPROM is not initialized or is If the fault persists, replace the relay module. error* corrupted.
  • Page 28: Appendix A: Display Setup

    If an Expanded Annunciator is wired to the limit control and interlock control strings, and connected to the 7800 SERIES Relay Module, additional hold messages, fault messages or code numbers enhance the original hold messages, fault messages or code numbers.
  • Page 29 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fig. 29. Login required If the user is authorized to change configuration settings, knows the display password, and wishes to continue with the parameter change, the user presses the OK button with the input focus on the “Yes” selection. If the user isn’t authorized to change the parameter or doesn’t want to change it, the user tabs to the “No”...
  • Page 30 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Call for Service Setup Setup of the Call for Service lockout message feature is accessed from the Display Menu (see the Fig. 34). The feature permits a custom message to be displayed in place of the standard lockout message.
  • Page 31 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module EDIT LINE Fig. 37. Edit Call for Service message The title displays which line of the message currently is being edited in addition to the line number displayed on the left side of the edit line. Up to 5 lines of the message is displayed in the page main body area.
  • Page 32 RS-485 pins of the edge connector (terminals 1-3) accepts Modbus communication requests as a Modbus slave. When the interface is disabled the RS-485 pins provide a communication bus for other 7800 SERIES accessories (Refer to page 5 Wiring). The current enable setting is displayed initially.
  • Page 33 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module • 4800 bps • 9600 bps • 19200 bps • 38400 bps • 57600 bps • 115200 bps The current baud rate setting is displayed when the page is initially entered. Fig. 43. Modbus baud rate setup The up and down arrow buttons are used to scroll through the speed choices on the edit line.
  • Page 34 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module MOST LEAST SIGNIFICANT SIGNIFICANT BYTE BYTE A Little-Endian setting is used when the Modbus response provides the 32-bit data in the following order: LEAST MOST SIGNIFICANT SIGNIFICANT BYTE BYTE Default setting is Big-Endian, but the current setting is displayed when the page is initially entered.
  • Page 35 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fig. 48. Annunciator terminal T19 The up and down arrow buttons are used to scroll through the terminal numbers when the input focus is on the terminal selection line. As the terminal number changes the current name assigned for the terminal is displayed.
  • Page 36 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module The up and down arrow buttons are used to scroll through the message numbers, 1-20, on the message number line. As the message number changes the message text for the message number is displayed. The right and left arrow buttons are used to navigate to the text edit line.
  • Page 37 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module ARROW DOWN ARROW Fig. 55. Tab from annunciator custom message command line Sleep Time The display sleep time determines whether the LCD in the display module should go blank or not after a period of time when no user activity occurs with the device. The display sleep time can be set to one of the following settings: •...
  • Page 38 Device type num- RM78XXX, R7140, or Device type ber. EC78XXX Position of Run/ Indicates if 7800 SERIES is Run/Test switch RUN or TEST Test switch. in RUN or TEST mode. Burner control T6 Indicates if input is on or off,...
  • Page 39 ON or OFF terminal I/O state. energized or de-energized. Display shows state of PFEP jumper. If jumper is Pilot Flame Es- intact, 7800 SERIES was 10 tablishing Period Jumper 1 INTACT/CLIPPED second PFEP. If jumper is (PFEP). clipped, 7800 SERIES has 4 second PFEP.
  • Page 40 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Selectable Mes- Possible States/ Description Comments sage/Display Range (Terminals) Amplifier Flame 0.8 second, 1 second, 2 Flame response Failure Response Time seconds, or 3 seconds (FFRT) in seconds. Timing value of purge Purge time mm:ss Two seconds to 30 minutes.
  • Page 41 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module d Display values are as follows: • n represents a numbered value • T represents a terminal number • x represents the suffix letter of the Relay module eBurner control terminal name is displayed f Assigned annunciator terminal name is displayed.
  • Page 42 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fig. 60. Language setup The up and down arrow buttons are used to scroll between the possible selections and highlight the one the user wants. The left arrow button is used to exit this page and not make any language change (page is exited and control returns back to Display setup menu).
  • Page 43: Appendix B: Burner Control Commissioning

    7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Models that do not use the Heater Function The heater function is not available for these models that have a software revision level starting less than 5. The heater function will not work regardless of the setting in the Heater Mode setup.
  • Page 44 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module • Postpurge time • Valve proving when option (when valve proving is executed) • Valve proving time Postpurge time specifies how long the burner should be purged after it leaves the “RUN” state. Valve proving (VP) is a feature that provides a systematic way of testing the valve seat integrity to assure the valves are indeed closed when the system is off-line or idle.
  • Page 45 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fig. 68. Invalid commissioning login If the login is unsuccessful, the user can retry the login by tabbing back to the password digits using the left or right arrow buttons and re-edit the password. After a successful login the next commissioning page is automatically displayed (directed by the burner control module) to setup one of these parameters depending on the model: •...
  • Page 46 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Because of these configuration constraints the minute and seconds digits increment/ decrement in steps that force the time into these allowed settings. Fig. 70. Commission valve proving time The up and down arrow buttons are used to increment/decrement the minutes and seconds digits in the edit line.
  • Page 47 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module To view and confirm Postpurge timing refer to the Commissioning page (see Fig. 65) or in the BC Diagnostics page (see Fig. 78) for locations in the menu system. The Commissioning page can only be viewed when the Burner Control is in an appropriate state to permit commissioning.
  • Page 48: Appendix C: Diagnostics

    7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module The Burner commission reset page is displayed for the final step of the commissioning procedure. After all configuration and confirmations are done the RESET button on the burner control module must be pressed and held for 5 seconds. This page (see Fig. 75) automatically displays when the burner control module wants this reset action to be performed.
  • Page 49 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module • Postpurge time (if applicable) • Valve proving (VP) when option setting (if applicable) • Valve proving (VP) time (if applicable) • Manufacturing code • Software revision • Reset count (number of times the module has reset due to an internal fatal error) •...
  • Page 50: Appendix D: Annunciator Terminal Messages

    7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module • Supply voltage to the display • Backlight power (percentage of power driving the backlight) • Backlight feedback (current feedback from backlight) • Heater status (percentage of power driving the LCD heater) • Number of received Modbus packets •...
  • Page 51: Appendix E: Modbus Function

    The S7800 ModBusTM Data Feature Recirculating Fixed enables terminal 1, 2 to Data + and Data -. Table 16 provides register mapping. It Fixed Exhaust fan identifies the mapping of the 7800 SERIES Combustion Fixed parameters to ModBusTM registers. Fixed Oil pump Function Codes...
  • Page 52 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module The maximum number of addresses that can be queried is 127 (0x7F) for each query message. Table 9 through 12 provide information on the function codes. NOTE: All Query and Response cells below are 1 byte. Number Number Starting...
  • Page 53 0 to 255 represents 0.0 to 25.5 volts. Not 000A 40011 nal strength clipped to 5.0V like S7800. BC Flame 2 sig- 000B 40012 0 to 4095. N/A for 7800 SERIES. nal strength 000C 40013 BC State Bits See Table 19. S7830 First Out 000D 40014 Not supported from S7800.
  • Page 54 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Reg- Address Parameter Read/ For- ister Notes (hex) Name Write (dec) Bit 0: Autonomous. Bit 1: Remote commanded off. Bit 2: Remote commanded High fire. Bit BC Remote 3: Remote commanded low fire. 0054 40085 Command...
  • Page 55 NOTE: “Device Data Ready” and “S7800 Compatibility” bits can be used to quickly check device availability and compatibility then read/write registers of only these devices. Response Message Format for Function Code 17 This format is device specific and is only available for the 7800 SERIES burner control. See Table 17. Func- Device...
  • Page 56 RM7838A EC7840L RM7838B EC7865 RM7840E EC78xx RM7840G Table 18. Burner Control Type Codes. RM7840L 7800 SERIES Burner Control State RM7840M Bits RM7885A The burner control sequence state is RM7888A translated into State Bit Register as shown in Table 19. RM7890A...
  • Page 57 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module value of zero. If the Fault Code is non- String Burn- zero, the sequence state field contains 7800 Code Reg- the sequence state code when the lockout SERIES Uses Con- ister occurred. Sequence mm:ss trol Line...
  • Page 58 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module String Burn- String Burn- 7800 Code 7800 Code Reg- Reg- SERIES Uses Con- SERIES Uses Con- ister ister Sequence mm:ss trol Sequence mm:ss trol Line Line Line Line 40003 40003 State State State State Bits Bits...
  • Page 59 FLAME TOO STRONG HOLD (EA) 184 75 4002h FLAME-OUT TIMER OTHER PII Table 20. 7800 SERIES Sequence State Codes and FUEL SELECT OFF Associated register code values. HIGH FIRE JUMPERED HIGH FIRE SWITCH 7800 SERIES String Codes Table 21 contains a listing of all string...
  • Page 60 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module String Code String String Code String MAN-OPEN SW. OFF Operator Control T6 = 1 MAN-OPEN SW. ON Interlock T7 = 0 MAN-OPEN SW. Interlock T7 = 1 NO PURGE CARD Airflow Interlock T7 = 0 OTHER INTERLOCKS Airflow Interlock T7 = 1 OTHER PREIGN ILK...
  • Page 61 Jumper 2 Clipped VPS OFF Jumper 3 Intact VPS ON Table 21. Table 21. 7800 SERIES String codes. Jumper 3 Clipped) The values that follow are generated when the 7800 SERIES Fault Codes fault code is zero and the Expanded Annunciator...
  • Page 62 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Fault Fault Fault Fault Message String Fault Message String Code Code (NOTE: FAULT n: is not in Code (NOTE: FAULT n: is not in Code (Reg (Reg the Fault and Strings Code) (Table the Fault and Strings Code) (Table...
  • Page 63 7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module Fault Fault Fault Fault Fault Message String Fault Message String Code Code (NOTE: FAULT n: is not in Code (NOTE: FAULT n: is not in Code (Reg (Reg the Fault and Strings Code) (Table the Fault and Strings Code) (Table...
  • Page 64 FAULT 21d: HIGH LIMITEA FAULT 21c: LWCOEA FAULT 21b: AUX LIMIT #2EA For More Information The Honeywell Thermal Solutions family of products includes Honeywell Combustion Safety, Eclipse, Exothermics, Hauck, Kromschröder and Maxon. To learn more about our products, visit ThermalSolutions.honeywell.com or contact your Honeywell Sales Engineer.

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