Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 297)

Programming Reference
B–9
Address Description Classification Bit
S:2/5 ➀ Incoming
Command
Pending Bit Status This bit is set when the processor determines
that another node on the network has
requested information or supplied a command
to it. This bit can be set at any time. This bit is
cleared when the processor services the
request (or command).
S:2/6 ➀ Message
Reply
Pending Bit Status This bit is set when another node on the
network has supplied the information you
requested in the MSG instruction of your
processor. This bit is cleared when the
processor stores the information and updates
your MSG instruction.
S:2/7 ➀ Outgoing
Message
Command
Pending Bit Status This bit is set when one or more messages in
your program are enabled and waiting, but no
message is being transmitted at the time. As
soon as transmission of a message begins, the
bit is cleared. After transmission, the bit is set
again if there are further messages waiting. It
remains cleared if there are no further
messages waiting.
S:2/8 to
S:2/13 Reserved NA NA
➀ Valid for Series C discrete only.
Reference