Chapter 4 - i/o interfacing – B&B Electronics RS-232 Digital Relay I/O 232DRIO User Manual
Page 16
14 232DRIO-0308
Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Command: !0S
Argument: {…} (shown in bold face)
Response: none
ASCII Example: !0S
Hex. Example: !0S<03>
Bin. Example: !0S<00000011>
Description:
Relay #2 is energized (“1”), and Relay #1 is
energized (“1”).
Command: #0S
Argument: {…}{~…} (shown in bold face)
Response: none
ASCII Example: #0S
Hex. Example: #0S<03>
Description:
Relay #2 is energized (“1”), and Relay #1 is
energized (“1”). Note that the complement is
returned immediately following the data byte.
NOTE: If any of these lines are defined as inputs the bit settings are
ignored. Since Bit 2 is defined as Input #1 the bit setting is ignored.
Two important ideas to keep in mind when sending commands
back to back or in sequence are the following:
1)If the “!0R” is sent, one character delay must follow immediately
before any other commands are sent.
2)If the “#0R” is sent, two character delay must follow immediately
before any other commands are sent.
For example:
1) “!0R_!0S1”
2) “#0R_ _ #0S1”
Otherwise, the microcontroller will miss the second “!” or “#” and not
interpret the second command at all since it is still trying to transmit
the returned data byte(s) to the user.
Chapter 4 - I/O Interfacing