Write Multiple Registers - Function Code 16; Write Multiple Registers Query; Write Multiple Registers Response - ABB C1300 User Manual Supplement

C1300
Advanced Circular Chart Recorder
5.6 Write Multiple Registers – Function Code 16

5.6.1 Write Multiple Registers Query

Holding registers existing within the controller can have their contents changed by this message (a maximum of 8 registers). When
used with slave address zero (broadcast mode) all slave controllers load the selected registers with the contents specified.
Example – a write multiple register request to write the value 10 to the register address 121 and the value 100 to the register address
122 in slave 01 is shown below.
Register Start
Offset
Address Function
High
01 10 00

5.6.2 Write Multiple Registers Response

The response confirms slave identification, function code, starting register address and quantity only.
Example:
Address Function
01 10
12
Number of
Registers
Low
78 00 02
Register Start Offset
Number of Registers
High Low
00 78
Holding
Byte
Register 121
Count
High Low
04 00 0A
00 02
5 Modbus Functions
Holding
Register 122
Error Check Field
High Low
00 64 D4
Error Check Field
00 10
IM/C1300–MOD
(CRC-16)
C4
(CRC-16)
90
Rev. C