NANOTEC PD4-C, Техническое руководство

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7 Special functions
Input Special function Switching threshold
switchable
Differential / single-ended
1 Negative limit switch no, 24 V fixed single-ended
2 Positive limit switch no, 24 V fixed single-ended
3 Home switch no, 24 V fixed single-ended
4 –Release
4 +Release
5 –Direction
5 +Direction
6 –Clock
6 +Clock
The inputs for release,
direction and clock can
only be switched together
between 5 V or 24 V (see
3240
h
:06
h
)
The inputs for release,
direction and clock can only
be switched together. In
the "single-ended" mode,
the respective negative
input (e.g., "-Release") is
deactivated (see 3240
h
:07
h
)
7.1.2.2 Object entries
The value of an input can be manipulated using the following OD settings, whereby only the corresponding
bit acts on the input here.
●
3240
h
:01
h
(Special Function Enable): This bit allows special functions of an input to be switched off (value
"0") or on (value "1"). If input 1 is not used as, e.g., a negative limit switch, the special function must be
switched off to prevent an erroneous response to the signal generator. The object has no effect on bits 16
to 31.
The firmware evaluates the following bits:
○
Bit 0: Negative limit switch
○
Bit 1: Positive limit switch
○
Bit 2: Home switch
If, for example, two limit switches and one home switch are used, bits 0–2 in 3240
h
:01
h
must be set to "1".
●
3240
h
:02
h
(Function Inverted): This bit switches from normally open logic (a logical high level at the input
yields the value "1" in object 60FD
h
) to normally closed logic (the logical high level at the input yields the
value "0"). This applies for the special functions (except for the clock and direction inputs) and for the
normal inputs.
If the bit has the value "0", normally open logic applies; for the value "1", normally closed logic applies. Bit
0 corresponds to input 1 here, bit 1 to input 2, etc.
●
3240
h
:03
h
(Force Enable): This bit switches on the software simulation of input values if it is set to "1".
In this case, the actual values are no longer used in object 3240
h
:04
h
, but rather the set values for the
respective input.
●
3240
h
:04
h
(Force Value): This bit specifies the value that is to be read as the input value if the same bit
was set in object 3240
h
:03
h
.
●
3240
h
:05
h
(Raw Value): This object contains the unmodified input value.
●
3240
h
:06
h
(Input Range Select): This can be used to switch inputs – that are equipped with this function –
from the switching threshold of 5 V (value "0") to the switching threshold of 24 V (value "1").
●
3240
h
:07
h
(Differential Select): This object switches from "single-ended" input (value "0") to differential
inputs (value "1").
●
60FD
h
(Digital Inputs): This object contains a summary of the inputs and the special functions.
7.1.2.3 Computation of the inputs
Computation of the input signal using the example of input 1:
The value at bit 0 of object 60FD
h
is interpreted by the firmware as negative limit switch; the result of the
complete computation is stored in bit 16.
Version: 2.0.1 / FIR-v1650 80