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8-2
ZCOM
8.1 Network refresh instructions
8.1.1 Refresh instruction for the designated module
(S(P)/J(P)/G(P).ZCOM)
ZCOM
The ZCOM instruction is used to perform refresh at any timing during execution of a
sequence program.
The targets of refresh performed by the ZCOM instruction are indicated below.
• Refresh of CC-Link IE controller network (when refresh parameters are set)
• Refresh of MELSECNET/H (when refresh parameters are set)
• Auto refresh of CC-Link (when refresh device is set)
• Auto refresh of intelligent function module (when auto refresh is set)
Function
(1) When the ZCOM instruction is executed, the CPU module temporarily suspends processing
of the sequence program and conducts refresh processing of the network modules
designated by Jn/Un.
Jn : Network No. of host station (BIN 16 bits)
Un : Head I/O number of host station network module (BIN 16 bits)
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn Constants Other
Bit Word Bit Word
–– ––
Basic
Process
High
performance
Redundant
Universal
Command
Command
S.ZCOM
SP.ZCOM
Command
S.ZCOM
Command
SP.ZCOM
Jn
Jn
Un
Un
S.ZCOM
SP.ZCOM
S.ZCOM
SP.ZCOM
Refresh
processing
Execution of ZCOM
instruction
END
Refresh
processing
Refresh
processing
Refresh
processing
Refresh
processing
END
Execution of ZCOM
instruction
Execution of ZCOM
instruction
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