20-11
PPC Manual Revision 1
Chapter 20: Modbus Communication
01 Reading multiple I relays
Element
Message
start mark
(:)
Address No.
(ADR)
Function code
(0x01)
I relay
start No.
Number
of read I
relays
Error
check
Message
end mark
(CR+LF)
1 1 2 2 2
1 2 2 4 4 2 2
Element
Message
start mark
(:)
Address No.
(ADR)
Function code
(0x01)
Byte count
(Note 1)
I relay content
1 1 1 1
1 2 2 2 2
I relay content
Error
check
Message
end mark
(CR+LF)
1 2
2 2 2
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