Blocking; User-Controlled Blocking; Automatically Controlled Blocking - Festo MSE6-E2M Original Instructions Manual

5 Measurement and control functions
5.5

Blocking

5.5.1

User-controlled blocking

If the "Auto blocking control bit" output (Am.0.1) is inactive, the shut-off valve can be controlled dir­
ectly using the "Blocking control bit" output (Am.0.0). The "Pressurisation control bit" output (Am.0.2)
has no influence on the switching status of the shut-off valve.
Am.0.1:
Auto blocking control bit
Am.0.0:
Blocking control bit
Em.3.0:
Shut-off valve status bit
Pressurisation
Fig. 5.6 Behaviour of user-controlled blocking
5.5.2

Automatically controlled blocking

If the shut-off valve is in the "Pressurisation" state, then, if the "Auto blocking control bit" output
(Am.0.1) is activated, the measured flow is compared with the limit settable in the parameter "Auto
shut-off low flow limit" (P19-20). If this limit value is not reached for the duration of the value set in the
parameter "Auto shut-off delay time" (P17-18), the shut-off valve will switch to the "Blocking" state.
Q
Auto blocking
Flow limit value
Fig. 5.7 "Auto blocking" function
The automatic blocking function is activated when the "Auto blocking control bit" output (Am.0.1) is
activated and the "Blocking control bit" output (Am.0.0) is inactive. In this state, the measured flow
value is compared with the limit value set in the parameter "Auto shut-off low flow limit" (P19-20). If
the limit value is not reached, the "Auto blocking timer" is started.
Festo – MSE6-E2M-SY-EN – 1703d – English
Active
Inactive
Active
Inactive
Blocking
Short-time
production
downtime
Pressurisation
Short-time Auto blocking
production Delay
downtime
Blocking
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