6100 MPS-B Programming Manual

INTRODUCTION TO 6100 MPS-B
Message Formats
ENVOY FORMAT SEQUENTIAL SELECT REQUEST (Burroughs protocol):
Text Out field = 3 + 3 * station count + message length in
bytes
Text field =
|<---- MCW ---->|<------ sequence-header -------- ...
_________________________________________________
| | | | | | |
| 0 | 0 | [EOT] | r | si1 | 0 | ...
| | | | | | |_
... -------------------- sequence-header ------------------>|
___________________________ ___________________________
| | | | | | | |
... | r | si2 | 0 | . . . | s | sin | 0 |...
| | | | | | | |_
|<---------------------- message ---------------------->|
_________________________________________/ /_____________
| | | | | / / | |
... | [SOH] | an | an | [STX] |<---- text --->| [ETX] |
| | | | | / / | |
/ /
r = Sequential select function code
si1, si2, ..., sin = Station character addresses
0 = placeholder in sequence-header
s = Fast select function code
an = Station character address
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