41
SET COLL-AVOID-US
N (usecs)
• USED WITH “FIXEDRTS” FLOW CONTROL ONLY.
• IF NON-ZERO, TRANSMITTER WILL WAIT UP TO N
MICROSECONDS FOR DCD TO GO LOW BEFORE
TRANSMITTING.
• USEFUL FOR IMPLEMENTING COLLISION-AVOIDANCE
WITH “DUMB” RADIO-MODEMS.
• IMPLEMENTED INTERNALLY IN MULTIPLES OF 208 MICROSECONDS.
0
SET NHALFBYTES
N (halfbytes)
• MODIFIES MODBUS/RTU AND DF1 SERIAL RECEPTION BEHAVIOR.
DURING DATA PACKET RECEPTION, AFTER “N” HALF-BYTE TIME PERIODS
HAVE ELAPSED WITH NO FURTHER DATA RECEIVED, THEN END-OF-
PACKET IS ASSUMED. DOES NOT AFFECT MODBUS/ASCII OR ADAM-4000
RECEPTION BEHAVIOR.
• MODIFYING THIS SETTING MAY IMPROVE RECEPTION RELIABILITY
WHEN USING AN UNCONDITIONED (EG. BELL-202) RADIO-MODEM.
7
( MODBUS/RTU
DEFAULT =
3.5 BYTE TIMES )
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