Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 377)

Chapter 27
The Status File
27–9
Address Description 5/02
5/01,
Fixed
S:2/7 DH–485 Outgoing Message Command Pending Bit
Read only. 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, or it remains cleared if there are
no further messages waiting.
You can use this bit as a condition of an SVC instruction to enhance
the communication capability of your processor.
•
S:2/8 CIF (Common Interface File) Addressing Mode
Applies to Series C and later SLC 5/02 processors only.
Read/write. This bit controls the mode used by the SLC 5/02
processor to address elements in the CIF file (data file 9) when
processing a communications request.
Word address mode – in effect when the bit is clear (0): This is the
default setting, compatible with other SLC 500 devices on the
DH–485 network.
Byte address mode – in effect when the bit is set (1): This mode is
used when a SLC 5/02 processor is receiving a message from a
device on the network, possibly through a bridge or gateway. This
setting is compatible with Allen-Bradley PLC inter-processor
communication.
•
S:2/9
thru
S:2/13 Reserved
• •