Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 301)

Chapter
Call Routines 69–127 13
13 -43
Input Argument Three
The third input argument specifies the number of message retries when in
half-duplex mode or the number of ENQuiry retries to perform when in
full-duplex mode. Message retries specifies the number of message
transmission retry attempts made before giving up and flagging the
transmission as failed. PUSHing 0 indicates only the initial attempt is
made and if not acknowledged by the master the attempt is flagged as
failed. ENQuiry retries specifies the number of ENQ’s to transmit before a
packet transmission is flagged as failed. The valid range for both is 0 to
254.
Input Argument Four
The fourth input argument specifies the RTS On Delay time period when in
half-duplex mode or the number of NAK received retries to perform when
in full-duplex mode. RTS On Delay specifies in 5 ms increments the delay
between when a Request-To-Send (RTS) is activated and a transmission is
initiated. Only used if HDMwCC or HDMwoCC is selected through the
first input argument. The valid range for the RTS On Delay is 0 to 65535.
NAK Received Retries specifies the number of packet retries to transmit
due to receiving NAK responses. The valid range for NAK Received
Retries is 0 to 254.
Input Argument Five
The fifth input argument specifies the RTS Off Delay time period.
RTS Off Delay specifies in 5 ms increments the delay between when a
transmission is completed and a Request-To-Send (RTS) is deactivated.
The valid range for the RTS Off Delay is 0 to 65499. This argument is
only used if HDMwCC or HDMwoCC is selected through the first input
argument. This input argument is only used for half-duplex mode.
When full-duplex mode is selected a NULL value must be PUSHed.
Input Argument Six
The sixth input argument specifies the BASIC module address that the
DF1 driver responds to when receiving enquires from a remote DF1
device. Legal values are 0 to 254. This input argument is used for
half-duplex and full-duplex mode.