Technical data’s and circuit diagrams for the modular system
PCD0
26/766 E2
(HB_PCD0 26 766_E2.DOC)
SAIA-Burgess Controls Ltd.
Page 99
4.19.5
Control data from the PLC to the module (outputs)
5 words are transferred from the PLC to the module. Their meanings
depend on word 5 (see below):
Word 1
Word 2
Word 3*
Word 4*
Word 5
X
X
X
X
xx00 x000 xxxx xxxx b
No impact,
i.e. no data
loaded in module
X
X
X
X
xxxx xxxx xxxx xx1x b
Enable outputs
(0=off)
X
X
X
X
xxxx xxxx nnnn 1xxr b
Feedback bit
active, i.e. the
state of r is
mirrored on bit n
of word 5 to the
PLC
Counter value
Counter 1
(MSB)
Counter value
Counter 1
(LSB)
X
X
xx01 x000 xxxx xxxx b
Load counter 1
X
X
Counter value
Counter 2
(MSB)
Counter value
Counter 2
(LSB)
xx10 x000 xxxx xxxx b
Load counter 2
Counter value
Counter 1
(MSB)
Counter value
Counter 1
(LSB)
Counter value
Counter 2
(MSB)
Counter value
Counter 2
(LSB)
xx11 x000 xxxx xxxx b
Load counters 1
and 2
Pre-shutdown
value
Counter 1
(MSB)
Pre-shutdown
value
Counter 1
(LSB)
Pre-shutdown
value
Counter 2
(MSB)
Pre-shutdown
value
Counter 2
(LSB)
xxxx x001 xxxx xxxx b
Load pre-
shutdown values
(Counters 1 and
2)
Shutdown
value
Counter 1
(MSB)
Shutdown
value
Counter 1
(LSB)
Shutdown
value
Counter 2
(MSB)
Shutdown
value
Counter 2
(LSB)
xxxx x010 xxxx xxxx b
Load shutdown
values
(Counters 1 and
2)
Override data
Counter 1*
X
Override data
Counter 2*
X
xxxx x011 xxxx xxxx b
Load override
data
(Counters 1 and
2)
Configuration
data
Counter 1*
X
Configuration
data
Counter 2*
X
xxxx x100 xxxx xxxx b
Load
configuration
data
(Counters 1 and
2)
X: any word valuex: any bit value
MSB: Most Significant Bit
b: binary representation
*: For details see below
LSB: Least Significant Bit
*Word 3 and 4 are not transmitted if the data width is set to 3. Word 5 will then be transmitted as word 3.
