Maple Systems OIT Family (ASCII) - Manual (Page 9)

Error Codes
Code Description Cause
0 No Error OIT received proper control command
1 Timeout Error
OIT did not receive the entire command (including the command
or line terminator) before intercharacter delay timeout occurred
2 Packet Error
OIT received the entire command but all or part of the command
was defective
3 Invalid Command ASCII host sent an invalid command (for example, r instead of R
for the Read OIT Memory Command)
4
Invalid Memory
Address
ASCII host sent a request to read/write to an invalid OIT internal
memory address
5 Invalid Length ASCII host sent an invalid data byte length (not 1, 2, 3, or 4)
6 Invalid Data ASCII host sent data which does not match the length specified
Echo Command
ESC
A text terminator
text = Maximum of 10 printable ASCII characters.
Description: The echo command can be used by the ASCII host to verify that the OIT
is properly connected to the serial link.
Response: errorcode text lineterminator
text = Text received from ASCII host with echo command.
Display Screen Command
ESC
M msgnum terminator
msg num = 0-500 in decimal (Base 10) format. Leading zeroes are not required
if the message number is less than three digits (for example, 5 or 005
is acceptable). If the message number is greater than 500, the OIT sets
the Invalid Msg status coil.
Description: Requests a new screen to be displayed on the OIT.
Response: errorcode lineterminator
Clear Poll Buffer Command
ESC
O terminator
Description: Clears the OIT’s polling buffer if in Network mode. Not required if in
Interactive mode.
Response: errorcode lineterminator
Poll Buffer Command
ESC
P terminator
Description: Polls the OIT’s polling buffer if in Network mode. The OIT stores any data
that is to be sent to the ASCII host in this buffer until the host sends this command. The
OIT then sends the contents of the polling buffer to the ASCII host. This command is
not required if in Interactive mode.
Response: errorcode buffercontents lineterminator
buffer contents = Contents of the OIT’s polling buffer.
8 OIT Family Operation Manual (ASCII)
1010-0088, REV02