Rockwell Automation D17846.2.4 CONTROLNET KT EMULA - Manual (Page 19)

Publication 1784-6.2.4 - September 1997
What Your Driver Must Do at Start-up 2-3
Usage With Interrupts
The KTCX, by default, is set up to be poll operated even if the card
has been set up to interrupt the host. Bits 0 and 1 at byte offset 801h
must be set to configure the card for interrupts. Table 2.B show you
how to set bits 0 and 1 to in order to configure your card to meet your
specifications.
Table 2.B Bit Values for Configuring the dual-port
KTCX Card Shutdown
Use the following instructions to shutdown the KTCX card. (Refer to
example code for details):
1. Write an FFh into byte offset 0004h (KTCX link state)
2. Write an 01h into byte offset 0014h (KTCX_off_KTCX)
3. Wait until byte offset 0015h (KTCX_stopped_flag) transitions to
an FFh. This should complete in 0.5 seconds. If not, there is a
critical error.
4. Write a 01h into byte offset 803h.
5. Write a 04h into byte offset 0012h.
6. Write a 00h into byte offset 014h.
Restarting the KTCX Card After Shutdown
After card shutdown, the emulation can be restarted without hard
resetting the card by returning to step 2 in “Initializing the KTCX
Card”
Value=0 Value=1
Bit 0 do not interrupt when send
box is available interrupt when send box is
available
Bit 1 do not interrupt when data is
available in receive box interrupt when data is avail-
able in receive box