Festo MSE6-E2M Operating Instruction page 20

Functions
– When the auto blocking control bit output, Am.0.1, is activated and the blocking control bit output,
Am.0.0, is deactivated, the switching status of the shut-off valve is determined by the auto blocking
timer status bit inputs, Em.3.4-3.5, timer of the function for automatic blocking. After the expiry of
the parameterised delay time, auto blocking delay time, P17-18, the shut-off valve is automatically
switched to the blocking state.
– When the blocking control bit output, Am.0.0, is activated, the shut-off valve always switches to the
blocking state regardless of other signal states.
The switching status of the shut-off valve is signalled via the shut-off valve status bit input, Em.3.0,
and the number of valve switching cycles via the valve switching cycles parameter, P31-32.
Auto blocking timer
The status of the auto blocking timer is determined by the following input variables:
– If the parameterised auto blocking low flow limit value, P19-20, is not reached, a comparator
activates the auto blocking function.
– Activating the auto blocking control bit output, Am.0.1, activates the auto blocking function.
– The pressurise control bit output, Am.0.2, can be used to switch the shut-off valve back to the
pressurise state after an automatic blocking operation. Automatically controlled blocking remains
active.
The status of the auto blocking timer is signalled via the auto blocking timer status bits inputs,
Em.3.4-3.5.
Monitoring of parameters
The unit flow rate, P8.2-8.3, unit flow standard, P8.6-8.7, and auto blocking flow limit value, P19-20,
parameters are checked on input for permitted values. In case of error, the appropriate error message
is output if parameterisation error monitoring is activated, P0.7.
Module number m = 1
Function number = 4828 + m * 64 + parameter numbers
20 Festo — MSE6-E2M — 2022-08d