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Summary of Contents for Seneca Z-4RTD2-SI
- Page 1 USER MANUAL Z-4RTD2-SI CONVERTER FOR THERMISTORS WITH 4 CHANNELS AND 24BIT ADC SENECA S.r.l. Via Austria 26 – 35127 – Z.I. - PADOVA (PD) - ITALY Tel. +39.049.8705355 – 8705355 Fax +39 049.8706287 www.seneca.it ORIGINAL INSTRUCTIONS...
- Page 2 Set-up must be performed only after correct installation and the user must follow all the operations described in the installation manual carefully. Seneca is not responsible for failures, breakages and accidents caused by ignorance or failure to apply the stated requirements.
- Page 3 User Manual Z-4RTD2-SI Document revisions DATE REVISION NOTES AUTHOR 22/06/2022 First revision Added sampling rate changes for fw 1010 revision. 10/10/2022 Added info on float swapped registers Corrected errors in the Modbus register list ALL RIGHTS RESERVED. NO PART OF THIS www.seneca.it...
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Page 4: Table Of Contents
User Manual Z-4RTD2-SI TABLE OF CONTENTS INTRODUCTION ......................6 DESCRIPTION ......................6 COMMUNICATION PORT SPECIFICATIONS ............6 TYPE OF SUPPORTED SENSORS ................7 RESPONSE MEASURES AND TIMES ................ 7 SAMPLING TIMES AND MEASUREMENT UPDATE TIME ........7 FILTER ........................8 MODBUS RESPONSE TIME .................. - Page 5 REPRESENTATION OF A 32-BIT VALUE IN TWO CONSECUTIVE MODBUS HOLDING REGISTERS ..................... 15 TYPE OF 32-BIT FLOATING POINT DATA (IEEE 754) ......... 16 Z-4RTD2-SI: MODBUS 4X HOLDING REGISTER TABLE (FUNCTION CODE 3) 17 ALL RIGHTS RESERVED. NO PART OF THIS www.seneca.it...
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Page 6: Introduction
Use the installation manual for more information. ATTENTION! In any case, SENECA s.r.l. or its suppliers will not be responsible for the loss of data/revenue or consequential or incidental damages due to negligence or bad/improper management of the device, even if SENECA is well aware of these possible damages. -
Page 7: Type Of Supported Sensors
User Manual Z-4RTD2-SI TYPE OF SUPPORTED SENSORS The supported sensors are: SENSOR STANDARD MEASURING RANGE PT100 EN 60751/A2 (ITS-90) -200 ÷ +650°C PT500 EN 60751/A2 (ITS-90) -200 ÷ +750°C PT1000 EN 60751/A2 (ITS-90) -200 ÷ +210°C NI100 DIN 43760 -60 ÷ +250°C... -
Page 8: Filter
User Manual Z-4RTD2-SI ATTENTION! In order not to lose the settings, NEVER update the firmware with a version older than the one installed on the device. FILTER To each channel it is possible to insert a low pass filter to stabilize the measurement, it is a 10-sample moving average filter. -
Page 9: Device Configuration
User Manual Z-4RTD2-SI DEVICE CONFIGURATION The device can be configured using the Easy Setup or Easy Setup 2 software, configurations are as follows: SENSOR TYPE: allows you to select the type of sensor connected to the channel, it is also possible to disconnect the channel if it is not used. -
Page 10: Firmware Update
User Manual Z-4RTD2-SI FIRMWARE UPDATE Through the USB port it is possible to update the firmware. To update the firmware: 1) Disconnect the device from the power supply; 2) Holding down the firmware update button (positioned as shown in the figure), reconnect the device to... -
Page 11: Modbus Communication Protocol
User Manual Z-4RTD2-SI 6) Once the firmware file has been copied, the device will automatically reboot and be ready for use. 7) Verify that the fw update was successful by connecting the device to the Easy Setup software, the firmware revision (in this case 1002) is shown in the bottom left:... -
Page 12: Modbus Register Table
User Manual Z-4RTD2-SI MODBUS REGISTER TABLE The following abbreviations are used in the register tables: Most Significant Least Significant MSBIT Most Significant Bit LSBIT Least Significant Bit MMSW “Most” Most Significant Word (16bit) Most Significant Word (16bit) Least Significant Word (16bit) LLSW “Least”... -
Page 13: Numbering Of "0-Based" Or "1-Based" Modbus Addresses
According to the Modbus standard the Holding Registers are addressable from 0 to 65535, there are 2 different conventions for numbering the addresses: "0-BASED" and "1-BASED". For greater clarity, Seneca shows its register tables in both conventions. ATTENTION! CAREFULLY READ THE DOCUMENTATION OF THE MODBUS MASTER DEVICE IN ORDER TO UNDERSTAND WHICH OF THE TWO CONVENTIONS THE MANUFACTURER HAS DECIDED TO USE NUMBERING OF MODBUS ADDRESSES WITH "0 -BASED"... -
Page 14: Bit Convention Within A Modbus Holding Register
User Manual Z-4RTD2-SI A further convention is also possible where the number 4 is omitted in front of the register address: HOLDING MODBUS ADDRESS MEANING WITHOUT 4x FIRST REGISTER SECOND REGISTER THIRD REGISTER FOURTH REGISTER FIFTH REGISTER BIT CONVENTION WITHIN A MODBUS HOLDING REGISTER... - Page 15 User Manual Z-4RTD2-SI MSB and LSB BYTE CONVENTION WITHIN A MODBUS HOLDING REGISTER A Modbus Holding Register consists of 16 bits with the following convention: LSB Byte (Least Significant Byte) defines the 8 bits ranging from Bit 0 to Bit 7 included, we define MSB Byte...
- Page 16 User Manual Z-4RTD2-SI TYPE OF 32-BIT FLOATING POINT DATA (IEEE 754) The IEEE 754 standard (https://en.wikipedia.org/wiki/IEEE_754) defines the format for representing floating point numbers. As already mentioned, since it is a 32-bit data type, its representation occupies two 16-bit holding registers.
- Page 17 User Manual Z-4RTD2-SI Z-4RTD2-SI: MODBUS 4X HOLDING REGISTER TABLE (FUNCTION CODE 3) ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) MACHINE UNSIGNED 40001 Identification code IDENTIFICATION 16 BIT Bit[15] 1 = IN1 MEASURE OUT OF RANGE 0 = IN1 MEASURE OK...
- Page 18 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) 20000 -> 200.00 Ohm) PT1000/PT500/NI100 0 [Ohm/10] (example 2000 -> 200.0 Ohm) If Measure Type = "°C" unit measure is [°C/10] For example 2000 -> 200.0° C If Measure Type = "Ohm"...
- Page 19 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) If Measure Type = "°C" unit measure is [°C/10] For example 2000 -> 200.0° C If Measure Type = "Ohm" unit measure SIGNED 16 40006 16 bit MEASURE PT100/NI100/NI120/...
- Page 20 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) UNSIGNED 40024 NOT USED Not used 16 BIT UNSIGNED 40025 NOT USED Not used 16 BIT UNSIGNED 40026 NOT USED Not used 16 BIT UNSIGNED 40027 NOT USED Not used...
- Page 21 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) Bit[15..12] Not Used Bit[11:9] Filter: 0=not active 1=active Bit[8:6] RTD TYPE 0= PT100 1= NI100 2= PT500 3= PT1000 4= CU50 5= CU100 6= NI120 7= NI1000. INPUT UNSIGNED...
- Page 22 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) Bit[15..12] Not Used Bit[11:9] Filter: 0=not active 1=active Bit[8:6] RTD TYPE 0= PT100 1= NI100 2= PT500 3= PT1000 4= CU50 5= CU100 6= NI120 7= NI1000. INPUT UNSIGNED...
- Page 23 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) Bit[15] Floating Point Representation 0= MSW FIRST 1= LSW FIRST Bit[14..4] NOT USED Bit[3] IN1 FAULT BEHAVIOUR 1 = LOAD FAIL VALUE 0 = KEEP LAST VALUE Bit[2] IN2 FAULT...
- Page 24 User Manual Z-4RTD2-SI ADDRESS OFFSET REGISTER ORDER CHANNEL DESCRIPTION TYPE (4x) Offset for the 40134 measure channel [°C/Ohm] Offset for the 40135 OFFSET [°C / Ohm] measure channel FLOAT 32 40136 [°C/Ohm] Offset for the 40137 OFFSET [°C / Ohm]...
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