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RKC INSTRUMENT AE500 Communication Instruction Manual

Digital indicator with alarm function
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Digital indicator
with alarm function
AE500
Communication
Instruction Manual
IMAE02-E3
RKC INSTRUMENT INC.
®

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Summary of Contents for RKC INSTRUMENT AE500

  • Page 1 Digital indicator with alarm function AE500 Communication Instruction Manual IMAE02-E3 RKC INSTRUMENT INC. ®...
  • Page 2 All Rights Reserved, Copyright  1999, RKC INSTRUMENT INC.
  • Page 3 Thank you for purchasing the RKC instrument. In order to achieve maximum performance and ensure proper operation of your new instrument, carefully read all the instructions in this manual. Please place this manual in a convenient location for easy reference.
  • Page 4 CAUTION This is a Class A instrument. In a domestic environment, this instrument may cause radio interference, in which case the user may be required to take adequate measures. This instrument is protected from electric shock by reinforced insulation. Provide reinforced insulation between the wire for the input signal and the wires for instrument power supply, source of power and loads.

  • Page 5: Table Of Contents

    CONTENTS Page 1. SPECIFICATIONS..............1 2. WIRING.................2 3. SETTING FOR COMMUNICATION........4 3.1 Transfer to Communication Setting Mode ............4 3.2 Communication Parameter Selection ..............5 3.3 Device Address Setting ...................6 3.4 Communication Speed Setting................9 3.5 Data bit Configuration Setting ...............11 3.6 Interval Time Setting ..................13 3.7 Communocation Requirements ..............17 4.PROTOCOL .................19 4.1 Polling......................19...
  • Page 6 MEMO IMAE02-E3...

  • Page 7: Specifications

    1. SPECIFICATIONS Interface: Based on RS-485, EIA standard Connection method: 2-wire system, half-duplex multi-drop connection Communication distance: 1 km max. The maximum communication distance will be affected by the surrounding conditions. Synchronous method: Start/stop synchronous type Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps Data bit configuration: Start bit: 1 Data bit: 7 or 8...

  • Page 8: Wiring

    Signal ground Send data/Receive data T/R (A) Send data/Receive data T/R (B) Wiring method Connection to the RS-485 port of the host computer Paired wire RS-485 AE500 Host computer T/R (A) T/R (A) T/R (B) T/R (B) Communication terminal Shielded twisted...
  • Page 9 When the host computer uses Windows 95/98/NT, use a RS-232C/RS-485 converter with an automatic send/receive transfer function. Recommended: CD485, CD485/V manufactured by Data Link, Inc. or equivalent. The cable is provided by the customer. Connection with up to 31 AE500 and one host computer Host computer Host computer RS-232C...

  • Page 10: Setting For Communication

    3.1 Transfer to Communication Setting Mode 1. Turn on the power to the AE500. Thus, the input type and PV display change in this order. 2. Pressing the SET key while the shift key is being pressed when PV display is being displayed selects communication setting mode.

  • Page 11: Communication Parameter Selection

    3. SETTING FOR COMUNICATION 3.2 Communication Parameter Selection Parameters in communication setting mode are selected in the order of device address Add, communication speed bPS, data bit configuration bIT and interval time set value InT. Each parameter is selected by pressing the SET key. Display flowchart (Display for approx.

  • Page 12: Device Address Setting

    If key operation is not performed for more than 1 minute without pressing the SET key after the device address is set, the AE500 is automatically changed to PV display. In this case, the set device address returns to the value before the setting is changed.
  • Page 13 3. SETTING FOR COMUNICATION 2. Press the shift key to change the display from character to set value. Character display of device address Set value display of device address ALM1 ALM2 ALM4 ALM1 ALM2 ALM4 ALM3 ALM3 3. Set the device address. Press the UP key to enter 5 in the lowest digit. ALM1 ALM2 ALM4 ALM3...
  • Page 14 3. SETTING FOR COMMUNICATION 5. Press the UP key to enter 1 in the tens digit. ALM1 ALM2 ALM3 ALM4 6. Press the SET key to select the next communication parameter “Communication speed (bPS).” As a result, the set device address is registered. IMAE02-E3...

  • Page 15: Communication Speed Setting

    If key operation is not performed for more than 1 minute without pressing the SET key after the device address is set, the AE500 is automatically changed to PV display. In this case, the set communication speed returns to the value before the setting is changed.
  • Page 16 3. SETTING FOR COMMUNICATION 2. Press the shift key to change the display from character to set value. Set value display of Character display of communication speed communication speed ALM1 ALM2 ALM4 ALM1 ALM2 ALM4 ALM3 ALM3 3. Press the DOWN key to enter 1 in the lowest digit. As a result, a communication speed of 4800 bps is set.

  • Page 17: Data Bit Configuration Setting

    If key operation is not performed for more than 1 minute without pressing the SET key after the device address is set, the AE500 is automatically changed to PV display. In this case, the set data bit construction returns to the value before the setting is changed.
  • Page 18 Example: When setting data bit configuration to “1: 8 data bits, no parity bit and 2 stop bits.” 1. Change the AE500 to communication setting mode, and then display the data bit configuration. For details, see the 3.1 Transfer to Communication Setting Mode (P. 4) and 3.2 Communication Parameter Selection (P.

  • Page 19: Interval Time Setting

    If key operation is not performed for more than 1 minute without pressing the SET key after the device address is set, the AE500 is automatically changed to PV display. In this case, the set interval time set value returns to the value before the setting is changed.
  • Page 20 249.9 (Approx. 250 ms) Thus, enter an interval time set value of 150 calculated from the above by pressing the UP or DOWN key at the front of the AE500. 4. Press the DOWN key to enter 0 in the lowest digit.
  • Page 21 3. SETTING FOR COMUNICATION 5. Press the shift key to brightly light the tens digit. ALM1 ALM2 ALM4 ALM3 6. Press the UP key to enter 5 in the tens digit. ALM1 ALM2 ALM3 ALM4 7. Press the shift key to brightly light the hundreds digit. ALM1 ALM2 ALM4 ALM3...
  • Page 22 3. SETTING FOR COMMUNICATION 8. Press the UP key to enter 1 in the hundreds digit. ALM1 ALM2 ALM4 ALM3 9. Press the SET key to change to the first communication parameter “Device address (Add).” As a result, the set interval time set value is registered. IMAE02-E3...

  • Page 23: Communocation Requirements

    Whether the host computer is using either the polling or selecting procedure for communication, the following processing times are required for AE500 to send data: -Response wait time after AE500 sends BCC in polling procedure -Response wait time after AE500 sends ACK or NAK in selecting procedure RKC communication (Polling procedure) Procedure details...
  • Page 24 Response send time after AE500 receives BCC + Interval time b: Response wait time after AE500 sends ACK or Response wait time after AE500 sends NAK To switch the host computer from transmission to reception, send data must be on line. To check if data is on line, do not use the host computer’s transmission buffer but confirm it by...

  • Page 25: Protocol

    4. PROTOCOL AE500 uses the polling/selecting method to establish a data link. The basic procedure is followed ANSI X3.28 subcategory 2.5, A4 basic mode data transmission control procedure (Fast selecting is the selecting method used in this AE500). The polling/selecting procedures are a centralized control method where the host computer controls the entire process.

  • Page 26: Porlling Procedures

    Device Identifier address 1. Device address (2 digits) The device address specifies the AE500 to be polled and each AE500 must have its own unique device address. For details, see 3.3 Device Address Setting (P. 6). 2. Identifier (2 digits) The identifier specifies the type of data that is requested from the AE500.
  • Page 27 • When all the data has been sent (5) No response from the AE500 The AE500 will not respond if the polling address is not received correctly. It may be necessary for the host computer to take corrective action such as a time-out.
  • Page 28 An acknowledgment ACK is sent by the host computer when data received is correct. When the AE500 receives ACK from the host computer, the AE500 will send any remaining data of the next identifier without additional action from the host computer.

  • Page 29: Porlling Procedure Example

    4. PROTOCOL 4.1.2 Polling procedure example Normal transmission Host computer send Host computer send Host computer send Polling Identifier address Data AE500 send Identifier AE500 send Error transmission Host computer send Host computer send Host computer send Error data Polling Identifier...

  • Page 30: Selecting

    Host computer sends selecting address for the selecting sequence. Device address (2 digits) The device address specifies the AE500 to be selected and each AE500 must have its own unique device address. For details, see 3.3 Device Address Setting (P. 6).
  • Page 31 For the STX, ETX and BCC, see 4.1 Polling (P. 19). 1. Identifier (2 digits) The identifier specifies the type of data that is requested from the AE500, such as set value. For details, see 4.3 Communication Identifier List (P. 28).
  • Page 32 An acknowledgment ACK is sent by the AE500 when data received is correct. When the host computer receives ACK from the AE500, the host computer will send any remaining data. If there is no more data to be sent to AE500, the host computer sends EOT to terminate the data link. (5) NAK (Negative acknowledge) If the AE500 does not receive correct data from the host computer, it sends a negative acknowledgment NAK to the host computer.

  • Page 33: Serecting Procedures Example

    4. PROTOCOL 4.2.2 Selecting procedure example Normal transmission Host computer send Host computer send Host computer send Data Selecting Identifier address AE500 send AE500 send Error transmission Error data Host computer send Host computer re-send Host computer send …… Data Selecting...

  • Page 34: Communication Identifier List

    4. PROTOCOL 4.3 Communication Identifier List Communication is not possible when an identifier is specified that the AE500 can not recognize. The number of digits for data is 6. (Attribute RO: Read only, R/W: Read and Write) Iden- Factory set...
  • Page 35 4. PROTOCOL Continued from the previous page. (Attribute RO: Read only, R/W: Read and Write) Iden- Factory set Name Data range Attribute tifier value Alarm 3 differential gap Temperature input: Temperature 0 to 100 °C [°F] or setting input: 0.0 to 100.0 °C [°F] 2 or 2.0 Voltage/current inputs: Voltage/...

  • Page 36: Input Range Tables

    5. INPUT RANGE TABLES Input Range Table 1 Input type Input range Code Input Range 0 to 200 °C 0 to 400 °C 0 to 600 °C 0 to 800 °C 0 to 1000 °C 0 to 1200 °C 0 to 1372 °C 0 to 100 °C 0 to 300 °C 0 to 450 °C...
  • Page 37 5. INPUT RANGE TABLES Continued from the previous page. Input type Input range Code Input Range 400 to 1800 °C 0 to 1820 °C 800 to 3200 °F 0 to 3308 °F 0 to 800 °C 0 to 1000 °C 0 to 1600 °F 0 to 1832 °F 0 to 1200 °C...
  • Page 38 5. INPUT RANGE TABLES Continued from the previous page. Input type Input range Code Input Range 0 to 400 °C 0 to 800 °C Thermocouple 0 to 800 °F 0 to 1600 °F -199.9 to +649.0 °C -199.9 to +200.0 °C -100.0 to +50.0 °C -100.0 to +200.0 °C 0.0 to 50.0 °C...
  • Page 39 5. INPUT RANGE TABLES Input Range Table 2 Input type Input range Code Input Range 0 to 5 V DC Voltage 0 to 10 V DC * 1 to 5 V DC 0. 0 to 100.0 % Current 0 to 20 mA DC 4 to 20 mA DC * Z-1010 Specification.

  • Page 40: Troubleshooting

    6. TROUBLESHOOTING WARNING To prevent electric shock or instrument failure, always turn off the system power before replacing the instrument. To prevent electric shock or instrument failure, always turn off the power before mounting or removing the instrument. To prevent electric shock or instrument failure, do not turn on the power until all the wiring is completed.
  • Page 41 6. TROUBLESHOOTING Continued from the previous page. Problem Probable cause Solution No response Error in the data format Reexamine the communication program Transmission line is not set to the receive state after data send (for RS-485) EOT return The specified identifier is invalid Confirm the identifier is correct or that with the correct function is specified.

  • Page 42: Ascii 7-Bit Code Table

    7. ASCII 7-BIT CODE TABLE b5 to b7 b4 b3 b2 b1 ‘ ” & ’ < ¥ > ˜ IMAE02-E3...
  • Page 43 The first edition: FEB. 1999 The third edition: AUG. 2001...
  • Page 44 RKC INSTRUMENT INC. HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN PHONE: 03-3751-9799 (+81 3 3751 9799) E-mail: info@rkcinst.co.jp FAX: 03-3751-8585 (+81 3 3751 8585) IMAE02-E3 AUG.2001...

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