Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 191)

Message Formats
Appendix A
AĆ29
Set NAKs
Use this command to set 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 KE/KF module is 3 NAKs per
transmission.
Command Format:
FNC DLE SRC STX DST C
06
S TNS
MD TS TNS DLE ETX BCC
05
DATA
Reply Format:
DLE SRC STX DST C
46
S TNS
MD TS TNS DLE ETX BCC
Set Timeout
Use this command to set 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 KE/KF
module is 128 cycles, or about 3 seconds.
Command Format:
FNC DLE SRC STX DST C
06
S TNS
MD TS TNS DLE ETX BCC
04
DATA
Reply Format:
DLE SRC STX DST C
46
S TNS
MD TS TNS DLE ETX BCC