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Fig. 3: Block diagram of Input Signals
Digital Set Values
Digital set points are programmable, and are activated by digital inputs. Four (optionally five) of these
programmable set points can be selected with the respective input and an associated direction “+“ or
“-“. Digital set points are assigned and saved in parameters S1.01, S1.02, S1.03, S1.04 and S1.08.
The optional use of set point S1.08 is selected with parameter E17. The inputs are opto-decoupled
and can be controlled directly from the PLC.
If both directions “+” and “-“ are selected at the same time, none of the selected set points will be activated. If
no direction is selected, no set point will be activated. All four (or five) digital set points are passed
through the ramp function generator. All set points are additive and include no direction information
themselves. If several set points are selected at the same time, the sum of these set points is subsequently
processed. With binary combinations a total of 16 values can be selected. When parameter S1.08 is
activated 32 different set points can be selected.
Analog Set Values
The set points S1.05 and S1.06 are designed for voltage signals 0 ... ± 10 V. The set point S1.07 is
designed for a current signal 0 ... 20 mA (or 4 ... 20 mA), with a resistance of 250
Ω
. By selecting the
corresponding offset, the base current of 4 mA can be compensated. If E08 = 1, the set points are
passed through the ramp function generator (ramp). If parameter E08 = 0, the analog set points
bypass the ramp function. The set points S1.05, S1.06 and S1.07 are calculated according to their
polarity with the other set points. The input S1.05 is measured against analog GND (terminal 26z)
The input for S1.06 is designed as a differential input within the operating voltage range ± 15 V. The
signals for set points S1.05 and S1.06 must be standardized to ± 10 V otherwise the A/D converter is
overloaded.
ATTENTION!
To suppress interference unused analog set points must be bridged to analog
GND or be deactivated with parameter E17.
The analog set points S1.05, S1.06 and S1.07 are not real parameters; they
represent an external set.
