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Initial start-up and project planning
Type 8650 REV.2
17.5.2
Access rights maintenance/specialist
Some of the parameters described below can only be changed if PDM access is set to SPECIALIST.
You can learn more about reading and writing rights in the online help for the SIMATIC PDM
program.
17.5.3
Parameter functions
•
switching cycle counter diagnostics approval for pilot valves (read/write)
Defines whether a diagnostics alert will be generated when the warning parameter of a pilot valve swit
-
ching cycle counter is exceeded.
•
warning parameter switching cycle counter (read/write)
Defines the pilot valve switching cycle counter value at which a diagnostics warning is generated.
•
number of simultaneously switchable pilot valves – only relevant for 8-channel modules (read)
States how many pilot valves can be switched on simultaneously (see also boost time).
(Depending on the type and number of pilot valves, the total current during activation would exceed the
maximum current that the electronic module can provide).
In the 8-channel modules, the valves 0– 3 or 4– 7 each form one group.
In the event that more than 4 valves are to be switched on simultaneously (including the valves
already switched on), the following may occur:
• Case 1: In group 0– 3, no more valves are switched on.
Then the valves of group 4– 7 yet to be activated are immediately switched on.
• Case 2: In group 0– 3, additional valves are switched on.
Then the valves of group 4– 7 are switched on only after the “boost time” has ended.
•
Boost time for pilot valves (read/write)
When being switched on, the pilot valves receive an increased current. The current is reduced after the
boost time to minimise power consumption and optimise the power balance in the electronic module.
module
Value “boost time”
00171941 (4 channels 11 mm)
500
00171942 (8 channels 11 mm)
300
00171943 (4 channels 16.5 mm)
800
00171944 (8 channels 16.5 mm)
300
•
Date of the most recent switching cycle counter reset (read-only)
States when the actuator’s switching cycle counter was most recently reset.
•
switching cycle counter diagnostics approval for actuators (read/write)
Defines whether a diagnostics alert will be generated when the warning parameter of an actuator swit
-
ching cycle counter is exceeded.
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