Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC Communication Instructions 12-55
• Done bit DN (word 0, bit 13) is set when the message has completed
successfully. This bit is reset the next time the message rung goes from
false to true. Do not set or reset this bit. It is informational only.
• Enabled bit EN (word 0, bit 15) is set after the message rung goes from
false to true AND the scanner module accepts this message because it is
not currently processing any other explicit messages. (The scanner
module can only process one DEM instruction at a time.) If the message
rung goes false before the scanner module accepts this message, then
the enable bit will remain off and the message will not be executed. This
bit is reset when the message has completed with either the Done bit set
or the Error bit set and the message rung goes false. If the message rung
conditions remain true, you may retrigger the message instruction by
resetting this bit after either the ER or DN bit has been set, indicating
that the previous execution has completed.
• Waiting for Slot bit WS (word 0, bit 10) is set when the message rung
goes from false to true, but the scanner module is still processing
another DEM instruction. To ensure that this message gets processed,
you must leave the message rung conditions true until the WS bit is reset
and the EN bit is set, indicating that the scanner module has accepted
this message for processing. Do not set or reset this bit. It is
informational only.
Scanner Status, Error, and Error Description on the General Tab
The error code displays the explicit message status returned by the scanner
module. An error code of 01h means Transaction completed successfully.
Table 12.23 DEM Instruction Scanner Codes
Scanner Code Description of Scanner Status
2H Transaction in progress.
3H Slave not in scan list.
4H Slave offline.
5H DeviceNet port disabled/offline.
6H Transaction TXID unknown.
7H Slave not responding to explicit request.
8H Invalid command code.
9H Scanner out of buffers.
10H Another transaction in progress.
11H Could not connect to slave device.
12H Response data too large for block.
13H Invalid port.
14H Invalid size specified.
15H Connection busy.