Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 98)

Message Packet Formats
Chapter 5
5-19
Set NAKS
This command sets the maximum number of NAKs that the station
interface module will accept per message transmission. Put the number in
the DATA field. The default setting for the KF2 module is 3 NAKs per
transmission.
Command Format:
Reply Format:
TNS STS CMD
06
SRC DST
TNS STS CMD
46
SRC DST
FNC
05
DATA
Set Timeout
This command sets the maximum amount of time that the station interface
module will wait for an acknowledgment to its message transmission.
The setting is expressed as the number of cycles of an internal clock,
where 40 cycles equals 1 second. Put the number of desired cycles in the
DATA field. The default setting for the KF2 module is 128 cycles, or
about 3 seconds.
Command Format:
Reply Format:
TNS STS CMD
06
SRC DST
TNS STS CMD
46
SRC DST
FNC
04
DATA