4. PLC interface MCP1
28
Festo GDCP-CMXR-F-EN 0909a
Signal curves: Loading first program with negative confirmation:
Min. 1 prg. loaded
SREG2.B7 LOADED
1
Requirements:
ACK and NACK = 0
2
Rising edge at “Load
program” loads the new
program number N
”
Condition:
The program cannot be
loaded for one reason or
another.
3
The LOAD output must
carry 1-signal for as long as
it takes until the ACK input
also reports 1-signal.
4
As soon as NACK = 1 has
been recognised by the
PLC, it may reset LOAD to 0.
The CMXR reacts with a
falling edge at NACK.
5
As soon as NACK = 0 has
been recognised by the
PLC, the controller is ready
for a new job.
”
The cause of the failed
load procedure is registered
as an error.
Acknowledge
SREG2.B4 ACK
Not Acknowledge
SREG2.B5 NACK
Load the program
CREG2.B7 LOAD
Req. prg number
Output data
been recognised by the
PLC, the controller is ready
for a new job.
Содержание CMXR-C1
Страница 2: ......
Страница 42: ...6 Communication variables 42 Festo GDCP CMXR F EN 0909a...
