Operation
I
4-19
4
Opera
tion
Modbus Option Parameters
Register
Command
Poll
Select
Description
8018
Supply Temperature Retransmit Range Low (°C)
R
Floating Point
8020
Supply Temperature Retransmit Range High (°C)
R
Floating Point
8022
Low Temperature Safety – User Set (°C)
R/W
Floating Point
8024
High Temperature Safety – User Set (°C)
R/W
Floating Point
8026
Proportional Band (°C)
R/W
Floating Point
8052
Pump Running Hours
R
Floating Point
8054
Setpoint Temperature (°C)
R/W
Floating Point
8056
Low Temperature Safety – Factory Set (°C)
R
Floating Point
8058
High Temperature Safety – Factory Set (°C)
R
Floating Point
8070
Supply Temperature Input Offset
R
Floating Point
8072
Return Temperature Input Offset
R
Floating Point
8074
Remote Setpoint Temperature Input Offset
R
Floating Point
8080
Remote Setpoint Limit Temperature (°C)
R
Floating Point
8082
Remote Setpoint High Temperature Limit (°C)
R
Floating Point
Modbus Registers
The following is a list of Modbus Registers that are remotely available.
Notes:
•
There is a limitation on the maximum Modbus block size of 40 for integers and 20
for floats.
•
Additional settings include:
–
Baud: Set by parameter
bU
, 9600 baud by default.
–
Parity: None
–
Data bits: 8
–
Stop bits: 1
–
Flow control: None
•
It is common for external software to apply an address offset of “1”, so you may need
to add “1” to the Modbus addresses based on the software in the remote system.
•
In newer versions of Modbus, you may have to append a “4” or a “40” prefix on the
registers listed.
For example, to get to “MACHINE STATE” in register 4002, you may have to access
register 4002, 4003, 44002, 44003, 404002, or 404003. Once you test your system and
get a valid response, you will know the rules to consistently apply to your system for all
addresses.
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Содержание Thermolator TW-P
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