ECG-UG-16-006
REVISION
DATE
PAGE
AquaCIAT LD/ILD
Modbus
Rev A
1/13/17
5 OF 20
Company private. Do not distribute outside of CIAT Corporation
2.
Modbus Functions
The following standard function are supported
Code
Modbus function
Address register range
Application
01 with quantity 1
READ COIL STATUS
0 to 9999 (decimal)
None
01 with quantity N
READ MULTIPLE COIL STATUS
(from 1 to 2000max.
contiguous)
None
15 with quantity 1
WRITE COIL
None
15 with quantity N
WRITE MULTIPLE COILS (from 1
to 2000max. contiguous)
None
02 with quantity 1
READ DISCRETE INPUT
0 to 9999 (decimal)
Alarms
02 with quantity N
READ MULTIPLE DISCRETE
INPUTS (from 1 to 2000max.
contiguous)
04 with quantity 2
READ INPUT REGISTER
0 to 9999 (decimal)
Useful user parameters
04 with quantity NX2
READ MULTIPLE INPUT
REGISTERS (from 1 to 123 max.
contiguous)
Useful user parameters
03 with quantity 2
READ HOLDING REGISTER
0 to 9999 (decimal)
Configuration or service dataset
03 with quantity NX2
READ MULTIPLE HOLDING
REGISTERS (from 1 to 123 max.
contiguous)
Configuration or service dataset
16 with quantity 2
WRITE HOLDING REGISTER
Configuration or service dataset
16 with quantity NX2
WRITE MULTIPLE HOLDING
REGISTERS (from 1 to 123 max.
contiguous)
Configuration or service dataset