Moeller EC4-200 - Explanation of the Input;Output Signals (I;Q); Overview of Input;Output Signals (I;Q); Functions of the Input;Output Signals

05/06 AWB2724-1584GB
Incremental input
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Explanation of the input/output signals (I/Q)
Overview of input/output signals (I/Q)
Functions of the input/output signals
Switching the CPU from HALT l RUN enables the counter:
The incoming pulses are counted.
SetRefValue (Reset)
A rising edge 0 l 1 at the input overwrites the actual value with
the “RefValue” present at the input.
Counter (actual value)
The counter actual value is provided at the “Counter” input.
Zero
If the actual value reaches the value 0, the Zero output is set.
It remains set until it is acknowledged by a 0 l 1 edge at the
QuitZero input.
RefWindowMode (activate reference window)
You can use this signal to define whether the signal for setting the
reference window is sent via input I4 or via the user program with
the “SetRefWindow” signal.
RefMode (type of referencing)
The signal at the input determines whether referencing is carried
out once (0 at input) or permanently (1 at input). The actual value
is overwritten with the reference value if the reference window is
set and a reference pulse is present at input I3. This is carried out
once (if the conditions are present after the controller is started) or
permanently (with every reference pulse in the reference window
depending on the setting for the RefMode signal).
Figure 35: Input/output signals of the incremental value counter
Signal I/Q Explanation
RefDone I Referencing completed
(feedback signal of SetRefWindow)
RefActive I Referencing activated
(feedback signal of SetRefWindow or I4)
Zero I Actual value through zero
Counter I Counter actual value
QuitZero Q Acknowledge ZERO signal
RefMode Q Number of reference checks
0 = once
1 = permanent
RefWindowMode Q Activation of reference window by
0 = external input I4
1 = with “SetRefWindow” in the program
SetRefWindow Q Activation of reference window when
“RefWindowMode” = 1
SetRefValue Q Reference value overwrites actual value
(Reset)
RefValue Q Reference value
Figure 36: Input/output signals of the incremental value counter
RefDone
RefActive
Zero
Counter
QuitZero
RefMode
RefWindowMode
SetRefWindow
SetRefValue
RefValue
CPU
Signal A
l1
l2
l3
l4
Signal B
Reference
Signal
Reference
Window
Program
symbolic
addresses
Input
Incremental
encoder
Reference
switch