Function Codes And Number Of Devices Supported For Modbus Protocolsb-3 - Delta AS Series Operation Manual

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B.2 Function Codes and Number of Devices Supported
for Modbus Protocols
Applicable to AS series PLC
Function
code
01
02
03
04
05
06
0F
10
17
Name
Read Coil Status X, Y, M, SM, S, T, C, HC 1~256 bits
Read Discrete Input
X, Y, M, SM, S, T, C, HC 1~256 bits
Status
Read Holding Registers X, Y, SR, D, T, C, HC, E
Read Input Registers X
Force Single Coil Y, M, SM, S, T, C, HC
Preset Single Register Y, SR, D, T, C, HC, E
Force Multiple Coils Y, M, SM, S, T, C, HC
Preset Multiple Register Y, SR, D, T, C, HC, E
Read/Write Multiple
Y, SR, D, T, C, HC, E
Register
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Number of devices
supported
Description
(FW V1.06.00 or
1~100 words,
(1~50 for HC)
1~100 words
1 bit
1 word
1~256 bits
1~100 words,
(1~50 for HC)
1~100 words,
(1~50 for HC)
Number of devices
supported
(FW V1.06.10 or
later) later)
1~1600 bits
1~1600 bits
1~100 words,
(1~50 for HC)
1~100 words
1 bit
1 word
1~1600 bits
1~100 words,
(1~50 for HC)
1~100 words,
(1~50 for HC)