0
Device Addresses
B-3
B.2 Function Codes and Number of Devices Supported
for Modbus Protocols
Applicable to AS300 and AS200 series PLC
F
code
Name Description
Number of devices
supported
(FW V1.06.00 or
later)
Number of devices
supported
(FW V1.06.10 or
later)
01 Read Coil Status X, Y, M, SM, S, T, C, HC 1~256 bits 1~1600 bits
02
Read Discrete Input
Status
X, Y, M, SM, S, T, C, HC 1~256 bits 1~1600 bits
03 Read Holding Registers X, Y, SR, D, T, C, HC, E
1~100 words,
(1~50 for HC)
1~100 words,
(1~50 for HC)
04 Read Input Registers X 1~100 words 1~100 words
05 Force Single Coil Y, M, SM, S, T, C, HC 1 bit 1 bit
06 Preset Single Register Y, SR, D, T, C, HC, E 1 word 1 word
0F Force Multiple Coils Y, M, SM, S, T, C, HC 1~256 bits 1~1600 bits
10 Preset Multiple Register Y, SR, D, T, C, HC, E
1~100 words,
(1~50 for HC)
1~100 words,
(1~50 for HC)
17
Read/Write Multiple
Register
Y, SR, D, T, C, HC, E
1~100 words,
(1~50 for HC)
1~100 words,
(1~50 for HC)
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