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Modbus Commands
2-34
SIMATIC TI505/TI500 MODNIM User Manual
Modbus Function Descriptions (continued)
This
request is for the secondary node to change the values of 12 (0C hex)
coils starting at address 12 (18 decimal) to the states given by the following
bit pattern.
1 101
D
1 110
C
0 000
0
1 000
8
Coil 25 (ON)
Coil 18 (OFF)
Coil 29 (ON)
Coil 26 (OFF)
192021222324 313233 30 272825 18 29 26
Figure 2-28 Coil
Bit Patter
n
The bit pattern indicates that coils 19, 20, 21, 22, 24, 25, and 29 are to be
changed to ON and 18, 23, 26, 27, and 28 changed to OFF
.
Response: 07 0F 0012 000C XXXX
Checksum (XXXX)
Number of coils (000C)
Start coil address (0012)
Function code 15 (0F hex)
Slave address (07)
Figure 2-29 Write
Multiple Coils Example — Response
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1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 90 91

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