
-
38
NORESP
Bits: 11
1= Set by the ET.
The RT DID NOT respond with a Status or data as expected.
SOM
Bits: 10
1= Set by the ET.
The message is currently active.
The ET could be transmitting,
waiting for a response or receiving.
LOCAL_ RETRY
Bits: 9,8
Set by the CPU.
Bits( 9: 8) define a local specific retry scenario. If the BC control
word defines no retry as the option for the message, then the global retry is
enabled. If the global retry is defined as no retry, then their will not be a retry
for the message.
LOCAL RETRY OPTIONS
9
8
NO RETRY
0
RETRY ACTIVE BUS
0
1
RETRY ALTERNATE BUS
1
0
RETRY ALTERNATE BUS, THEN ACTIVE BUS
1
BUS
Bits: 7
0= Set by CPU & ET.
Message will use BUS A.
1= Set by CPU & ET
Message will use BUS B.
This bit defines the bus that the message will use. This bus setting,
however, can be overridden by the settings in CONFIGURATION 1.
See this register for specific details.
TFRSVINS
Bits: 6
0= Set by the CPU. The value of the Terminal Flag bit, the Reserved bits, and the
Instrumentation bit are treated as "Don't Care", and will NOT cause the
STATSET bit to be set no matter what their value in the returned Status
word.
1= Set by the CPU The STATSET bit will be set if the Terminal Flag bit, or one of the
Reservedbits or the instrumentation bit is set in the returned Status word.
SRQ
Bits: 5
0= Set by the CPU.
The value of the Service Request bit is treated as "Don't Care",
and will NOT cause the STASET bit to be set no matter what its value
in the returned Status word.
1= Set by the CPU.
The STATSET bit will be set if the Service Request bit is set in the
returned Status word.
BCST
Bits: 4
Set by the CPU. The operation of this bit is determined by bit 5 of CONFIGURATION
REGISTER 3. This bit will either be used as a mask or an xor flag for the
Broadcast Received bit in the returned status word.
CONFIGURATION REG 3 Bit 05 = 0 (BCST bit is an Xor Flag):
If the Broadcast Received bit in the returned status word DOES NOT equal the BCST bit of the
BC CONTROL WORD, then the STATSET bit in the BC CONTROL WORD will be set.
CONFIGURATION REG 3 Bit 05 = 1 (BCST bit is a Mask):
0= The value of the Broadcast Received bit is treated as "Don't Care", and will NOT cause the
STATSET bit to be set no matter what its value in the returned Status word.
1= The STATSET bit will be set if the Broadcast Received bit is set in the returned Status
word.