Hi, 

I would like to know for vlvmotL block, where and which parameters in the block can I set for the valve to become open when interlocks or protection inputs activated. 

Thanks

with regards,

snowball

Hello mesnowball, 

Please find attached the link , detailed documentation of the APL block . APL documentation

https://cache.industry.siemens.com/dl/files/967/109754967/att_939377/v1/s7jal90b_en-US.pdf

Tejaswi K C

Hello mesnowball, 

Please find attached the link , detailed documentation of the APL block . APL documentation

https://cache.industry.siemens.com/dl/files/967/109754967/att_939377/v1/s7jal90b_en-US.pdf

 Hi  Tejaswi, 

thanks for the link to  document.. I have some questions from the document. 

1) Is it that i must set the “safepos” to 0 = open

2) what does it means 2= stop? Is it if I set “safepos” = 2,

when protection or interlocks activated, the valve will stop at the position where it is?

example if it is closed will remain as closed. If open will remain as open. If mid travel will stop at mid travel? 

Many thanks

with regards, 

snowball

Hello snowball,

with the input "SafePos" you can set the neutral position for the valve.

• 0 => if the interlock is active the output "Close" will be come "TRUE" until you get the feedback valve closed.
  For example:
  If the valve is closed the valve will remain in the position.
  If the valve is open the valve will be closed until the input "FbkClose" will come "TRUE".
  If the valve is not completely open or closed the valve will be closed until the input "FbkClose" will come "TRUE"
• 1 => if the interlock is active the output "Open" will be come "TRUE" until you get the feedback valve opend.
  For example:
  If the valve is closed the valve will be open until the input "FbkOpen" will come "TRUE".
  If the valve is open the valve will remain in the position.
  If the valve is not completely open or closed the valve will be open until the input "FbkOpen" will come "TRUE".
• 2 => if the interlock is active the output "Open" and "Close" will become "FALSE" and the valve is remaining in the actucal position.
  For example:
  If the valve is closed the valve will remain in the position.
  If the valve is open the valve will remain in the position.
  If the valve is not completely open or closed the valve the valve will remain in the position.
  

So with the setting "2" at the input "SafePos" you will get the behavior what you described. 

With regards
Heisenberg

Hi Heisenberg,

thank you very much for your detail explaination. With this , Now I can bit confused between monsafepos and safepos. Appreciate you can enlighten me how to used them effectively? 

Many thanks

with regards,

snowball

Heisenberg2

Hello snowball,

with the input "SafePos" you can set the neutral position for the valve.

• 0 => if the interlock is active the output "Close" will be come "TRUE" until you get the feedback valve closed.
  For example:
  If the valve is closed the valve will remain in the position.
  If the valve is open the valve will be closed until the input "FbkClose" will come "TRUE".
  If the valve is not completely open or closed the valve will be closed until the input "FbkClose" will come "TRUE"
• 1 => if the interlock is active the output "Open" will be come "TRUE" until you get the feedback valve opend.
  For example:
  If the valve is closed the valve will be open until the input "FbkOpen" will come "TRUE".
  If the valve is open the valve will remain in the position.
  If the valve is not completely open or closed the valve will be open until the input "FbkOpen" will come "TRUE".
• 2 => if the interlock is active the output "Open" and "Close" will become "FALSE" and the valve is remaining in the actucal position.
  For example:
  If the valve is closed the valve will remain in the position.
  If the valve is open the valve will remain in the position.
  If the valve is not completely open or closed the valve the valve will remain in the position.
  

So with the setting "2" at the input "SafePos" you will get the behavior what you described. 

With regards
Heisenberg

Hello mensnownball

The monitoring error can occur in local mode if you have set 1, 3 or 5 for the input parameter LocalSetting (see Local mode (Page 79)). When LocalSetting is set to 2 or 4, a monitoring error can only occur when a rapid stop is triggered.

The following applies with LocalSetting 1 or 3: The monitoring error, the external error and the interlocks cannot be reset when the control and feedback signals do not match.

● When the control and feedback signals match, the monitoring error, external error and the interlocks are reset by stopping (StopLocal = 1) the drive.

● With Vlv2WayL in the MonSafePos = 1 setting, a monitoring error is reset by Pos0Local = 1.

● With VlvL, VlvMotL in the MonSafePos = 1 setting, a monitoring error is reset with the local command, which moves the valve to the neutral position.

● With Vlv2WayL, VlvMotL and VlvL in the MonSafePos = 0 setting, no reset of the monitoring error is required. The currently pending control is in effect.

● With Vlv2WayL, VlvL and VlvMotL, an external error is reset with the local command, which moves the valve to the neutral position

● With DoseL, you must acknowledge the protection (Protect) and flow alarms with a positive edge at the "CancelLocal" or "PauseLocal" output parameter. The following applies with LocalSetting 2, 4 or 5: