Detailed description
2.12 Block descriptions
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
135
PI service: DELETO
Function Delete tool:
Deletes the tool assigned to the transferred T number with all cutting edges (in TO, in some
cases TU, TUE and TG (type 4xx), TD and TS blocks).
Parameterization
Signal Type Range of values Significance
PIService ANY PI.DELETO Delete tool
Unit INT 1 - 10 TOA
WVar1 INT T number
PI service: MMCSEM
Semaphores for various PI services
For use by HMI and PLC
10 semaphores are provided for each channel. These protect critical functions for the
HMI/PLC. By setting the semaphore for the corresponding function number, several
HMI/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
HMI/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:
• Checkback value Done := TRUE: Semaphore has been set, critical function can be called
• Checkback value Error := TRUE with state = 3: 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.
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