User`s guide

4: BSC 3270 Link Configuration Options
DC 900-1340I 95
In some situations the remote computer may send a WACK (wait acknowledge)
sequence instead of the expected response (ACK0 or ACK1) to a transmitted data block.
BSC transmits an ENQ in response to the received WACK. The WACK–ENQ sequences
are not counted by BSC. Thus it is possible for the remote computer to prevent the
DLI_ICP_ERR_RETRY_EXCEEDED error by sending WACK until it is ready to send the correct
response.
To set this option using the DLI configuration file, use the retryLimit parameter; for
example,
retryLimit = 3. See Table 7–1 on page 190.
4.13 Poll List Delay Option (15)
This option specifies the amount of time a control station delays upon reaching the end
of the poll list. Delay time is specified in tenths of seconds and can range from zero (no
delay) to 8192 (819.2 seconds). The poll list delay is in addition to any interpoll delay
set (Section 4.21). This option is not used by links configured as tributary stations.
To set this option using the DLI configuration file, use the pollListDelay parameter; for
example,
pollListDelay = 0. See Table 7–1 on pag e 190.
4.14 Modem Control Option (16)
This option determines the operation of the request to send (RTS), data set ready
(DSR), and data carrier detect (DCD) modem signals. Ta ble 4 –2 lists the possible set-
tings for this option.
To set this option using the DLI configuration file, use the modemControl parameter; for
example,
modemControl = “FDX1”. See Table 7–1 on page 190.
4.14.1 RTS Signal
When the modem control option is set to half-duplex operation (HDX-1 or HDX-2),
the RTS signal is turned on when BSC is ready to transmit and turned off when trans-