IAI America XSEL Ethernet - Manual (Page 45)

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 CLOS (Channel close) [* When the Ethernet option is used]
Command, declaration Extension
condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Optional Optional CLOS
Channel
number
Prohibited CC
[Function] Close the channel specified in operand 1.
Transmission via the specified channel will hereafter be disabled.
(Note 1) Channel Nos. 31 through 34 can be specified in operand 1 with the Ethernet option.
[Example]
CLOS 31 Close channel 31.
LET 1 32 Assign 32 to variable 1.
CLOS *1 Close the content of variable 1 (channel 32).