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Seneca Z-DAQ-PID User Manual

Universal input with pid controller
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Universal input with pid controller
This document is property of SENECA srl. Duplication and reprodution are forbidden, if not authorized. Contents of the present
documentation refers to products and technologies described in it. All technical data contained in the document may be modified
without prior notice Content of this documentation is subject to periodical revision.
To use the product safely and effectively, read carefully the following instructions before use. The product must be used only for the use
for which it was designed and built. Any other use must be considered with full responsibility of the user. The installation,
programmation and set-up is allowed only for authorized operators; these ones must be people physically and intellectually suitable.
Set up must be performed only after a correct installation and the user must perform every operation described in the installation
manual carefully. Seneca is not considered liable of failure, breakdown, accident caused for ignorance or failure to apply the indicated
requirements. Seneca is not considered liable of any unauthorized changes. Seneca reserves the right to modify the device, for any
commercial or construction requirements, without the obligation to promptly update the reference manuals.
No liability for the contents of this documents can be accepted. Use the concepts, examples and other content at your own risk. There
may be errors and inaccuracies in this document, that may of course be damaging to your system. Proceed with caution, and although
this is highly unlikely, the author(s) do not take any responsibility for that. Technical features subject to change without notice.
USER MANUAL
Z-DAQ-PID
SENECA s.r.l.
Via Austria 26, PADOVA – ITALY
Tel. +39.049.8705355 – 8705359 Fax. +39.049.8706287
Web site:
www.seneca.it
Technical assistance:
supporto@seneca.it
Commercial reference:
(Other)
MI003419
MI002642-E
Page 1
(IT),
commerciale@seneca.it
support@seneca.it
(Other)
(IT),
sales@seneca.it

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Summary of Contents for Seneca Z-DAQ-PID

  • Page 1 Set up must be performed only after a correct installation and the user must perform every operation described in the installation manual carefully. Seneca is not considered liable of failure, breakdown, accident caused for ignorance or failure to apply the indicated requirements.

  • Page 2: General Characteristics

    USER MANUAL – Z-DAQ-PID Seneca Z-PC Line module: Z-DAQ-PID The Z-DAQ-PID module acquires one universal input signal (voltage, current, potentiometer, thermo-couple, thermo-resistance, m-voltmeter) and converts it to an analog format (with PID regulation). General characteristics  Three operating mode: conversion with PID regulator, conversion without PID regulator, manual (constant output configurated through ModBUS register) ...
  • Page 3 USER MANUAL – Z-DAQ-PID Potentiometer-type IN Scale range is configurable: from 1 k to 100 k (with parallel resistor R=330 to connect externally). Excitation current:1 mA. Input impedance:>5M Thermocouple-type IN For TC type: J, K, R, S, T, B, E, N. Input impedance:>5 M.
  • Page 4 USER MANUAL – Z-DAQ-PID OUTPUT Number Resolution 14 bit The output signal can be amplitude-limited by an “output limiter” Signal-amplitude limiting Voltage-type OUT Configurable between: 0-5 V, 0-10 V (with minimum load resistance: 1 k). Saturation value: 10.5 V Current-type Configurable between: 0-20 mA, 4-20 mA (with maximum load resistance: 600 ).

  • Page 5: Power Supply

    USER MANUAL – Z-DAQ-PID POWER SUPPLY 10 – 40 Vdc or 19 – 28 Vac (50Hz - 60Hz) Supply voltage Power Min: 0.5 W; Max: 2 W consumption The power supply transformer necessary to supply the module must comply with EN60742...
  • Page 6 USER MANUAL – Z-DAQ-PID 2. Connections For potentiometer input connection: you must add externally a R=330 , P=1 k- 100 k  3. Temperature Input Ranges The input rages are shown in the following tables for Thermocouple: TC-type Scale range...

  • Page 7: Operation Modes

    - manual (constant output), analog output - manual (constant output), ON/OFF output With reference to the following figure, the lowest part shows the Z-DAQ-PID setting procedure in three steps: input setting, operating modality setting, output setting. In particular, there are three operating modes, each of them allows to supply a ON/OFF output or...
  • Page 8 OUT is a ON/OFF signal. High state output is OUT-ES, low state output is OUT-SS (see the following figures) If out type is “ON/OFF”, the Z-DAQ-PID module allows to have a ON/OFF output with activation time t (time corresponding to the high-state output) directly proportional to OUT...
  • Page 9 USER MANUAL – Z-DAQ-PID It is possible to limit upper time of high-state ON/OFF output (reg.40029) and to limit lower time of low-state ON/OFF output (reg.40030). The cycle time is reg.40028 (constant frequency of ON/OFF output=1/cycle time). CONVERSION WITH PID In “Conversion with PID”...
  • Page 10 PID regulation allows to incline input signal PV (process value) to SP (set point value) with particular properties (rise time, overshoot, steady-state error, settling time, etc…). In the following figure is shown the Z-DAQ-PID module used as PID. In particular, “e” means the difference between set-point and process-value: Signal error e = (process value –...
  • Page 11 If Td increases Derivative action strengths Derivative action weaknesses Settling time decreases Noise is amplified 5. Setup Input setting To set Z-DAQ-PID input characteristics, configure the following registers: Description of register Option/Meaning Address V, mA, %, °C, , mV Input type 40003...
  • Page 12 1-19=filtering values Rejection 0b00=50Hz rejection 40006.[9:8] 0b01=60Hz rejection 0b10=Fast (no rejection) Operating mode setting To set Z-DAQ-PID functioning modality characteristics, configure the following registers: Description of register Option/Meaning Address Functioning modality 0=Conversion with PID, analog output 40007.[15:8] 1=Conversion without PID, analog output...
  • Page 13 PID) Offset Value in [%/100], with reference to the 40024 output scale range (if operating modality=conversion with PID) Output setting To set Z-DAQ-PID output characteristics, configure the following registers: Description of register Option/Meaning Address Output type 0=current 40004.8 1=voltage Output current type 0=active current (the module supplies 40004.12...
  • Page 14 USER MANUAL – Z-DAQ-PID Output end scale Value in [V, mA] 40014 (MSW) 40015 (LSW) Output limiter enabling 0=deactivated 40004.0 1=activated Limit inferior of the output Value in [%], with reference to the output 40018 (MSW) limiter scale range 40019 (LSW)

  • Page 15: Modbus Rtu Protocol

    USER MANUAL – Z-DAQ-PID Address=63 RS485 TERMINATOR (Dip-Switches: SW2) Meaning RS485 terminator disabled RS485 terminator enabled 7. Modbus RTU protocol All registers are “Holding register” (Read Modbus function 3) with the convention that the first register is the 40001 address.
  • Page 16 USER MANUAL – Z-DAQ-PID “MSB” = Most significant Byte “LSB” = Less significant Byte “MSW” = Most significant Word (16 bits) “LSW” = Less significant Word (16 bits) “R” = Read only register “RW” = Read and write register “R/W*” = Read and write register (flash store with command register 0xBEEE) “Unsigned 16 bits”...
  • Page 17 USER MANUAL – Z-DAQ-PID These bits aren’t used Bit [15:6] Over-scale range error for acquired input (over hardware Bit 5 limits): 0=there isn’t; 1=there is Amplitude detection of acquired input signal: 0=amplitude is Bit 4 between input start scale and input end scale; 1=amplitude...
  • Page 18 USER MANUAL – Z-DAQ-PID Address MSB, LSB R/W* 40033 Parity Address for RS485 (address of module/node if parameters Bit [15:8] are configurated by memory modality): from 0x01=1 to 0xFF=255 Parity for RS485: 0=there isn’t; 1=even parity; 2=odd Bit [7:0] parity...
  • Page 19 USER MANUAL – Z-DAQ-PID IN-ES LSW FP-32bit_LSW R/W* 40011 Input End Scale: [mA] (if current-type input); [V] (if voltage- 20 [mA] type input or millivoltmeter-type input); [%] (if potentiometer- type input); [°C] (if TC or RTD-type input) Percent Between:0-1 FP-32bit_MSW...
  • Page 20 USER MANUAL – Z-DAQ-PID TCT LSW FP-32bit_LSW 40086 Electric measure of input: [°C] (if TC-type input) with compensation CJ MSW FP-32bit_MSW 40079 CJ LSW FP-32bit_LSW 40080 Equivalent electric measure of the cold-junction: [mV] (if TC-type input) RTDO MSW FP-32bit_MSW 40087...
  • Page 21 USER MANUAL – Z-DAQ-PID Output current type: 0=active current (the module supplies Bit 12 the loop); 1=passive current (the sensor supplies the loop) These bits aren’t used Bit [11:9] Output type: 0=current; 1=voltage Bit 8 These bits aren’t used Bit [7:1] Output limiter: 0=deactivated;...
  • Page 22 USER MANUAL – Z-DAQ-PID Lim Inf MSW FP-32bit_MSW R/W* 40018 Lim Inf LSW FP-32bit_LSW R/W* 40019 Output limiter lower limit (measure unit is the same of output) (=0 [mA]) Lim Sup MSW FP-32bit_MSW R/W* 40016 Lim Sup LSW FP-32bit_LSW R/W*...
  • Page 23 USER MANUAL – Z-DAQ-PID Process Value FP-32bit_LSW 40104 Process value for the PID regulation: [mA] (if current-type input); [V] (if voltage-type input); [mV] (if millivoltmeter-type input); [%] (if potentiometer-type input); [°C] (if TC or RTD- type input) Process value Word 40108 Process value for the PID regulation: [µA] (if current-type...
  • Page 24 USER MANUAL – Z-DAQ-PID 0xBEEE (decimal 48878) – Save in Flash the actual Setup (registers with R/W*) Note: The Flash can be written for a Maximum of 20000 times.