IGS-NT Communication Guide
104
7.4.12 External Value1 – writing
Request: 01 10 18 D6 00 03 06 00 02 00 24 00 23 04 84
01 = controller address
10 = Modbus command
18 D6
= Register address: Object for engine commands (46359) – 40001 = 6358 DEC =>
18D6 HEX
00 03 = number of Modbus registers
06 = data length in bytes (00020024+0023)
00020024
= argument for Set ExtValue 1-4 (Commands for IGS-NT (page 72)) (value
36DEC = 0024HEX)
0023
= command number (Commands for IGS-NT (page 72)), command = 35 DEC =
0023 HEX
84 04 = Check field calculation (page 143) (write LSB MSB !)
Response: 01 10 18 D6 00 03 67 50
01 = Controller address
10 = Modbus command
18 D6 = Register addres
00 03 = Release value, number of written Modbus registers
50 67 = Check field calculation (page 143)
Note: Writing External Value in one step is possible only with direct connection to controller. If communication
bridge (IB-NT or I-LB+) is used, it is necessary to write the command and argument in two steps.
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