Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC Communication Instructions 12-61
Definitions for Message Status Bits on the General Tab
The table below lists the various status bits associated with the EEM
instruction as displayed in the EEM instruction setup screen.
• Ignore if timed out bit TO (word 0, bit 8) is set when the EEM
instruction times out due to no reply being returned within the
configured timeout period. You may also set this bit in order to abort
the EEM instruction before it has completed. The ER bit will be set at
the same time the TO bit is set. This bit is reset the next time the
message rung goes from false to true.
• Awaiting execution bit EW (word 0, bit 10) is set after the enable bit is
set and the message is physically placed in one of the four available
channel 1 transmit buffers. The EW bit is reset when either the ST or
ER bit is set. Do not set or reset this bit. It is informational only.
• Continuous run bit CO (word 0, bit 11) can be set in order to
continually resend the EEM command. Once the CO bit is set and the
EEM instruction is triggered, the EEM command will occupy one of
the four channel 1 transmit buffers. Therefore, a maximum of four
EEM and channel 1 MSG instructions may have their CO bits set at the
same time.
• Error bit ER (word 0, bit 12) is set when the message has failed to
complete 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.
• 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.
• Transmitting bit ST (word 0, bit 14) is set when the Ethernet
daughtercard has validated and accepted the EEM command for a
transmission attempt. The command may not have been transmitted yet.
Do not set or reset this bit. It is informational only.
Table 12.26 EEM Instruction Setup Screen Status Bits
Bit Definition Bit Mnemonic Bit Address
Ignore if timed out TO 0/8
Awaiting execution EW 0/10
Continuous run CO 0/11
Error ER 0/12
Done DN 0/13
Transmitting ST 0/14
Enabled EN 0/15
Waiting for queue space WQ 7/0