Issue
Communications with IP devices does not work.
Environment
IC3-Modbus
Modbus
IP devices
Cause
The IC3-Modbus is configured to poll two IP Modbus servers, but only the first configured server communicates.
Resolution
The IC3-Modbus uses a Gateway.txt file to list the Modbus IP servers, and the registers required. This file consists of general setup information and a section where the servers and registers are listed.
Note that the Sigma objects but be sequential in the list.
Final section of the Gateway.txt file.
; 7 Min Value (output objects only, 0 for inputs)
; 8 Max Value (output objects only, 0 for inputs)
; 9 Hardware Alarm Message Suppression Flag (optional),
; 0 = Don't suppress, 1 = Suppress
; read a single 16 bit register
;51,1,4,062,1,1,0,0,0
; read three 16 bit consecutive registers to objects 52, 53, 54
;52,2,4,065,1,3,0,0,0
; read two 16 bit consecutive registers to objects 55, 56
;55,1,3,101,1,2,0,0,0
; read two 16 bit consecutive registers containing un-swapped 32 bit unsigned data
;68,2,3,110,1,0x0102,0,0,0
; read two 16 bit consecutive registers containing swapped 32 bit unsigned data
;70,2,3,112,1,0x1102,0,0,0
; read two 16 bit consecutive registers containing un-swapped 32 bit signed data
;72,2,3,114,1,0x0202,0,0,0
; read two 16 bit consecutive registers containing swapped 32 bit signed data
;74,2,3,116,1,0x1202,0,0,0
; read two 16 bit consecutive registers containing un-swapped 32 bit float data
;76,2,3,118,1,0x0302,0,0,0
; read two 16 bit consecutive registers containing swapped 32 bit float data
;78,2,3,120,1,0x1302,0,0,0
The section below lists the input objects, which consist of a number of fields, the fields are made up as follows;
1 Sigma Object Number,
2 Controller Address
3 Modbus Command ( 3, 4, 16, 144)
4 Register Address
5 Min time in seconds before polling same controller (Default 1 second)
6 Number of consecutive objects to read (inputs objects only, 0 for outputs)
7 Min Value (output objects only, 0 for inputs)
8 Max Value (output objects only, 0 for inputs)
9 Hardware Alarm Message Suppression Flag (optional),
Notice that the Sigma object numbers are in sequence, they must be sequential.
52,1,3,0x804,1,0x1102,0,0,0
54,1,3,0x808,1,0x1102,0,0,0
56,1,3,0x80C,1,0x1102,0,0,0
58,2,3,0x810,1,0x1102,0,0,0
60,2,3,0x814,1,0x1102,0,0,0
62,2,3,0x818,1,0x1102,0,0,0
64,2,3,0x81C,1,0x1102,0,0,0
OUTPUT
111,1,144,0,1,1,0,100,0
112,2,144,0,1,1,0,100,0
113,1,16,4,1,1,1,30,0
; Controller to IP address mapping table (Serial comms will ignore this table)
; 1 - Controller Address
; 2 - IP address of the Controller or the gateway/router to access the
; controller
IP_ADDRESS_TABLE
Configure the Controller IP addresses.
1,10.158.100.114
2,10.158.100.205
; End of Gateway.txt file. Do not write below this line.
