Figure 6 Actual Value Curve In Normal Operation - WAGO 750 Product Manual

Functions
4.2.2 Normal Operation
The control current provided by the I/O module can be directly specified in the process
image (output) via a setpoint. The I/O module represents the present actual value in the
process image (input) as a current value or as a percentage of the nominal current.
In addition to the nominal current and setpoint, the control current is also influenced by
other downstream function blocks; see section
[} 44]. In the state upon delivery, the setpoint is mapped linearly onto the control cur-
rent. The following formula then applies:
Control current [mA] = nominal current [mA] × setpoint / 10000
The setpoint is specified in 0.01 % per least significant bit (LSB) of the nominal current.
The control current that a given setpoint actually results in depends on the settings of the
valve-specific module parameters. For ease of explanation, all subsequent descriptions
given always refer to this reference case.
The setpoint that the user has specified (Vx_SETPOINT) is output as an actual current
value according to the selected parameterization with or without ramping, dithering or lin-
earization, and the scaling is performed.
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14 Product manual | Version: 1.1.0
Proportional Valve Module 2-3-4
Event
Set SPL_EN to "1"
Change RSEL
Change setpoint
Set SPL_EN to "0"
Set SPL_EN to "1"
8 Overview of the Internal Signal Flow
Figure 6: Actual Value Curve in Normal Operation
Description/Behavior
Normal operation is activated.
Continuously active ramps of the process data are selected.
A change during a ramp is possible.
Running ramp travel is interrupted and continued using the new
setpoint.
Present current held during a ramp.
Running ramp travel is continued.
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