UMAX130511 Version 1.00A Preliminary Documentation
– May be subject to change
47 - 141
Figure 22
– Inching Function Block Objetcs
The Inching Control Block provides fast and easy setup to control output with dual input. The
Inching Control Block has two selectable inputs: Increasing Input, selected with Object 2610h
INCH Increment Input Source
and Object 2611h
INCH Increment Input Numbers
, and
Decreasing Input, selected with Object 2620h
INCH Decrecment Input Source
and Object 2621h
INCH Decrecment Input Number
. Both inputs of the block are digital, thus when a non-digital
signal is selected as an input it is interpreted in a manner described in section 1.1.
The Control implements a xor logic, where output value increases when incrementing input is ON,
decreases when decreasing input is ON and is held in current value while both inputs are ON or
OFF, as shown in Table 33. Output of the control block is a value between 0 and 100 (%).
Increasing
Input
Decreasing
Input
Output
OFF
OFF
HOLD
ON
OFF
INCREASE
OFF
ON
DECREASE
ON
ON
HOLD
Table 33
– Inching Control Logic
Each input has a selectable mode that defines how the control block output responses when an
input is ON. In ‘
Ramp
’ mode the output continuously ramps increasing towards maximum (100) or
ramps decreasing towards minimum (0), while an input signal is ON. In ‘
Notch
’ mode the output
increases by a set notch value, or decreases by a set notch value, when an input signal state
changes from OFF to ON. The modes are selected with Object 2612h
INCH Increment Response
and Object 2622h
INCH Decrement Response
. Ramp times are defined with Object 2613h
INCH
