Programming Guide

CHUMP Reference Guide
42
Wo
Name
Write digital input and output
Description
SAMSys readers have four optically isolated input lines and four
transistor buffered output lines. The lines are unidirectional.
Writing a “1” to an output port is equivalent to energizing a relay
or closing a switch.
The output ports require an external current source and pullups
(one for each output line).
Refer to the reader owner’s manual for deatiled information on
the digital input/output lines.
This command accepts a 2-digit HEX value. The lower digit
(second x) is written to the four output lines. The upper digit is
ignored.
Type
Reader management command with reply
Format
}Wo,d:<data>;<FCS><CRLF>
}Wo,d:<data>!<CRLF>
where:
d:<data> is the model specific 8-bit digital data.
Return Message
{A[,e:xx]*;<FCS><CRLF>