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MELSEC-Q
11 INSTRUCTIONS AND FUNCTIONS
ZCLOSE
Instruction
Z • CLOSE
• Closes a communication channel of a communication port used to communicate with an
external device.
Syntax
ZCLOSE [#<channel number>], [#<channel number>, • • • ]
channel number
• • • •
Specify the communication port to be closed.
Examples
ZCLOSE #1,#2
• • • •
Closes CH1 (RS-232C) and CH2 (RS-232C).
ZCLOSE
• • • •
Closes all communication ports opened in the
program.
Description
• The ZCLOSE instruction closes communication channels opened by the ZOPEN
instruction and terminates the communication through them.
• If <channel number> is not specified, all communication channels opened in the program
are closed.
• It is possible to specify multiple <channel number>, separating them by commas.
• Even if the ZCLOSE instruction is executed on a communication channel that is not open,
an error will not occur.
REMARK
See the ZOPEN instruction and Chapter 7.