Siemens SINUMERIK 840Di Function Manual page 1045

Parameterization
Signal
PIService
Unit
Addr1
PI service: LOGOUT
Reset password
Function:
The password last transferred to the NCK is reset.
Parameterization
Signal
PIService
Unit
Semaphores for PI services
MMCSEM
For use by MMC and PLC
10 semaphores are provided for each channel. These protect critical functions for the
MMC/PLC. By setting the semaphore for the corresponding function number, several
MMC/PLC units can be synchronized with it in cases where a function contains a critical
section with respect to data to be fetched by the NCK. Semaphores are managed by the
MMC/PLC. A semaphore value of 1stipulates a Test & Set operation for the semaphore of
the specified function number. The return value of the PI service represents the result of this
operation:
• Return value OK:
• Return value REJECTED:
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Type
ANY
INT
STRING
Type
ANY
INT
Semaphore has been set, critical function can be called.
Semaphore was already set, critical function cannot be called at the present time. The
operation must be repeated later.
Note
On completion of the operation (reading data of this PI service) it is essential that the
semaphore is enabled again.
Value range
PI.LOGIN
1
8 characters
Value range
PI.LOGOUT
1
Detailed description
2.12 Block descriptions
Meaning
Create password
NCK
Password
Meaning
Reset password
NCK
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