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8
SRC-8 III Installation and Operation Manual
INSTALLATION
Information Retrieval Commands
*POLL - Respond with unit (ID) address in appropriate time slot. If there are mul-
tiple units on the line, each will respond with a different delay after receipt of this
command.
*uSPii - Send status of input ii. Response is SuP,ii,x where x is 0 if the correspon-
ding input is high, 1 otherwise.
*uSPA
- Send status of all inputs. Response is SuP,A,x,x,x,x,x,x,x,x<CR><LF >
where input 1 is first and input 8 is last. x is 0 if the corresponding input is high, 1
otherwise.
*uSR - Send status of all OUTPUTS. Response is: SuA,x,x,x,x,x,x,x,x<CR><LF>
*uU - Send Unit Information :<name(SRC-8)><version n.nn><cr><lf>
Binary Commands
All commands start with a 2Ah (ASCII *)
The first byte contains the board ID and the byte count iiibbbbb
Byte count is number of bytes after the byte containing the byte count including
checksum
The second byte contains an 8-bit command. Some commands are followed by data
bytes.
Checksum is the LSByte of the sum of all bytes preceding checksum including start.
Binary commands must be received as a packet. If 50 ms or more passes after a
character is received, with no new character following, the SRC-8 III will begin
looking for a new string if no valid data packet has been received.
Commands to SRC-8 III
Command
Additional Data Bytes
Function
40h
RS-232 timer off
41h
RS-232 timer on
42h
Set serial speed to 2400
43h
Set serial speed to 9600
44h
Set serial speed to 4800
45h
Set serial speed to 38400
46h
Enable error & good responses
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