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QUESTION:
What options are there for aborting an active MDI record of an
FM353 or FM354?
ANSWER:
- Aborting with "STOP" control signal and individual command
"Delete distance to go"
With the "STOP" control command you can abort an active
MDI record. The FM353 or FM354 brakes to a standstill depending on
the delay parameterized (machine data 41).
If, after interrupting the current MDI record, you wish to start a
new MDI record, then you must use the individual command "Delete
distance to go".
Note:
After successfully execution of "Delete distance to go" and the
response "START RELEASE" (signal status "TRUE"), a new MDI record
can be started.
|
Address
|
Name
|
Type
|
Initial value
|
Actual value
|
Comment
|
|
Control signal
|
|
DBX15.1
|
STOP
|
BOOL
|
FALSE
|
TRUE
|
Stop signal
|
|
Status signal
|
|
DBX23.0
|
DRV_EN
|
BOOL
|
FALSE
|
TRUE
|
If the start release is TRUE, MDI record can be started
|
|
Individual command (write job)
|
|
DBX37.1
|
DELDIST_EN
|
BOOL
|
FALSE
|
TRUE
|
Trigger for individual command "Delete distance to go"
|
|
Finished signal
|
|
DBX47.1
|
DELDIST_D
|
BOOL
|
FALSE
|
TRUE
|
"TRUE" : "Delete distance to go" has been executed
|
|
Error signal
|
|
DBX57.1
|
DELDIST_ERR
|
BOOL
|
FALSE
|
FALSE
|
"TRUE" : Error has occurred during "Delete distance to go"
|
Table 1: Overview of signals used ("Stop")
- Aborting with control signal "Drive release"
You can abort an active MDI record by switching off the
"Drive release". The FM353 or FM354 brakes according to the voltage
ramp parameterized (machine data 45). After abortion of the MDI
record, the setpoint value is set to the actual
value.
Note:
If the Drive release is switched on again, then a new MDI
record can be started after the status signal "START RELEASE"
(signal status "TRUE").
|
Address
|
Name
|
Type
|
Initial value
|
Actual value
|
Comment
|
|
Control signal
|
|
DBX15.7
|
DRV_EN
|
BOOL
|
FALSE
|
TRUE
|
Drive release
|
|
Status signal
|
|
DBX23.0
|
DRV_EN
|
BOOL
|
FALSE
|
TRUE
|
If the start release is TRUE, MDI record can be started
|
Table 2: Overview of signals used ("Drive
release")
Notes on Points 1 and 2:
- The following requirements must be met to abort an active MDI
record of an FM353 or FM354:
- No digital input is parameterized as "Release input" or
"External Start".
- No dwell time G04 is set in the MDI record.
- Valid MDI records have been transferred to FM353 or FM354.
- You need the following to abort an active MDI record of an
FM353 or FM354:
- Configuration software SIMATIC S7 FM353 Stepper or FM354 Servo
>= Version 3.1,
- Standard FC 1 (FC POS_CTRL) in your project (in the cyclic
program).
- User data base for the FM353 or FM354 in your project.
- More information is available in the manual for FM353 (Edition
04/2002) – Entry ID 2106357 or FM354 (Edition 04/2002) – Entry ID
2110628:
- Structure of User Block - Section 6.5
- Description of "FC POS_CTRL" - Section 6.3.2
- Description of the MDI mode - Section 9.2.5
- Description of the Drive release - Section 9.1
Keywords:
Operating mode MDI, Drive release
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german
