WAGO-I/O-SYSTEM 750
Function Description
35
750-632 Proportional Valve Module
Manual
Version 1.3.0, valid from FW/HW-Version 01/01
5.2
Specifying the Setpoint Value
The control current provided by the I/O module can be directly specified in the
process image (output) via a setpoint value. The current actual value is depicted
by the I/O module in the process image (input) as the value of the current.
The following examples apply to the factory settings!
The control current, in addition to the nominal current and the setpoint value, is also
influenced by the downstream function blocks. In the delivered state, the setpoint value is
generated linearly from the control current. The following formula applies:
control current [mA] = nominal current [mA] * setpoint value / 10000
The setpoint value is specified by the nominal current in 0.01 % per LSB. The
configuration of the function blocks determines which control current actually arises for a
given setpoint value. For ease of explanation, all subsequent references always refer to
this reference case!
5.2.1
Specifying the Setpoint Value: Operating Mode with One
Valve
Table 20: Operating Mode with One Valve
Setpoint
value,
reference
Coil control
Setpoint
value range
Control value range
Coil A
Coil B
Valve 1
One coil
unidirectional
−
100 … < 0 % 0 %
0 %
0 … +100 % 0 … 100 %
0 %
Valve 1
One coil
bidirectional
−
100 … < 0 %
−
100 …< 0 % 0 %
0 … +100 % 0 … 100 %
0 %
Valve 1
Two coils
unidirectional
(4-wire)
−
100 … < 0 % 0 %
100 … 0 %
0 … +100 % 0 … 100 %
0 %
Valve 1
Two coils
unidirectional
(3-wire)
−
100 … < 0 % 0 %
100 … 0 %
0 … +100 % 0 … 100 %
0 %