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hamfam

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Everything posted by hamfam

  1. Help me guys please I have two control loops PID P1 and P2 P1 is working fine and it has logic to store 0 to "control value" without compiler faults P2 is working fine but it wont allow store 0 to "control value" , system responds compiler "tag is read only" Now i am thinking that P2 is wrong so i create a P3 and its the same P2 but it wont allow store 0 to "control value" , system responds compiler "tag is read only" when i duplicate P1 to P11 , the P11 acts the same as P1 and it compiles ok and store 0 to "control value" without compiler faults Now i am sure the logic should not allow me to store 0 to "control value" and the compiler is right but why does it work fine on P1 but it wont work on P2
  2. if I am right the operator can "disable alarm" ( for the foreseeable future ) with no evidence showing apart from the "disabled alarm" status in the alarm status viewer? The alarm status viewer could have 100 - 200 alarms as it contains the alarm status for the system. How is this right ? anyone? hamfam
  3. 1, How can I restrict access to the Disable button on the alarm status viewer - I do not want operators to disable alarms permanently 2, How can the duration minutes (on the alarm status viewer) have the maximum 12 hours instead of 43,200 minutes - I want the operators to able to shelve a alarm for the maximum shift (12 hours)(ie nuisance alarms) but I want to them to respond if the alarm is 12 hours old
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