C-863.12 Mercury Controller MS249E Version: 1.2.1 87
The Has Reference? parameter (ID 0x14) has no influence on the use of a digital input line as
the source of the reference signal.
➢ Select the source of the reference signal for the axis by changing the Source Of
Reference Signal parameter (ID 0x5C).
Detailed information on changing parameters can be found in "Adapting Settings" (p. 231).
Using digital inputs as source of the limit switch signals
Several digital inputs can be selected as the source for a limit switch signal.
If a limit switch signal is used for reference moves, only one digital input line may be selected
as the source of the limit switch signal.
The level of the digital input signal which you use instead of an internal limit switch may only
change once across the entire travel range.
➢ Use suitable signal sources.
➢ If necessary, invert the signal logic of the digital input lines by setting parameters Invert
Digital Input Used For Negative Limit (ID 0x5F) and Invert Digital Input Used For Positive
Limit (ID 0x60) accordingly.
The Has No Limit Switches? parameter (ID 0x32) determines whether the C-863.12 evaluates
the signals from the internal limit switches of the positioner. This parameter has no influence
on the use of digital input lines as the source of the limit switch signal.
➢ Select the source(s) of the negative limit switch signal for the axis by changing the
Source Of Negative Limit Signal parameter (ID 0x5D).
➢ Select the source(s) of the positive limit switch signal for the axis by changing the
Source Of Positive Limit Signal parameter (ID 0x5E).
Detailed information on changing parameters can be found in "Adapting Settings" (p. 231).
Example:
Digital input lines 1, 3, and 4 are to be used for axis 1 as the sources of the positive limit switch
signal. In addition, the signal polarity of lines 1 and 3 is to be inverted for axis 1. All adaptations
are made in the volatile memory of the C-863.12 only.
➢ Send:
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