Parameters/address space
4.3 Normal operation/Valve control
Digital output module DQ 4x24VDC/2A HS (6ES7132-6BD20-0DA0)
18
Manual, 03/2015, A5E34944434-AA
4.3
Normal operation/Valve control
Normal operation
"Normal operation" refers to the function of the DQ 4×24VDC/2A HS as digital output
module.
Valve control is a special function of normal operation.
Valve control function
You use valve control to switch to a smaller "holding current" after tightening the valve
(locked-rotor current). You do this by activating a pulse width modulation (see section Pulse
width modulation (Page 19)).
With a 0 → 1 transition of the digital channel, the configured holding time is started. After it
has expired, the pulse/pause duty factor is activated as pulse width modulation. The
actuating signal is output digitally as a pulse sequence of on and off pulses.
Configuration
You configure valve control with the following parameters:
●
"Normal operation" operating mode
●
Holding time valve control
●
Pulse width modulation duty factor
●
Pulse width modulation time period
Chronological sequence
The figure below shows the chronological sequence for valve control. The pulse width
modulation is activated in the next possible data cycle.
①
Data cycle
②
Holding time valve control
Figure 4-1
Valve control
Summary of Contents for DQ 4x24VDC/2A HS
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