**CIGAL Reference Manual, Chapter 2 (Commands): COMWRITE**
===== COMWRITE -- Write data to a serial communication port =====
**        usage:  comwrite buf [chan]**

COMWRITE writes the byte data into a BUF variable and sends it to the
communication port specified by CHAN. If CHAN is omitted, the first
output port is used by default. BUF can be either a character string
variable or a byte array variable (see [[jvs:cigal:manual:chapter2:declare|DECLARE(2)]]).
Before writing to a serial communication port it should be configured
by setting the [[jvs:cigal:manual:chapter4:com1|COM1(4)]] (or [[biac:jvs:cigal:manual:chapter4:com2|COM2(4)]]) parameters.
To read from a communication port use COMREAD (see [[jvs:cigal:manual:chapter3:comread|COMREAD(3)]]).

**See Also:**\\
[[jvs:cigal:manual:chapter3:comread|COMREAD(3)]], 
[[jvs:cigal:manual:chapter2:declare|DECLARE(2)]]

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