User`s manual

Installing and Configuring PMAC
Page - 22
3.6.1 - Disabling the overtravel limits flags
If no overtravel limits are intended to be used, they must be disabled through a change of the variable Ix25. On the terminal
window the following commands will disable the limits functions for all 8 motors. Select the motor numbers as appropriate.
The OR ( | ) bit-by-bit function used here is accessible by pressing shift + ”\” in the computer’s keyboard.
I125=I125|$20000 ;Motor #1
I225=I225|$20000 ;Motor #2
I325=I325|$20000 ;Motor #3
I425=I425|$20000 ;Motor #4
I525=I525|$20000 ;Motor #5
I625=I625|$20000 ;Motor #6
I725=I725|$20000 ;Motor #7
I825=I825|$20000 ;Motor #8
3.6.2 - Types of overtravel limits
PMAC expects a closed-to-ground connection for the limits to not be considered on fault. This arrangement provides a
failsafe condition and therefore it cannot be reconfigured differently in PMAC. Usually a passive normally close switch is
used. If a proximity switch is needed instead, the following type is recommended:
Related PMAC Jumpers must be configured appropriately, following the corresponding PMAC Hardware Reference.
3.6.3 - Home switches
While normally closed-to-ground switches are required for the overtravel limits inputs, the home switches could be either
normally close or normally open types. The polarity is determined by the home sequence setup, through the I-variables
I902, I907, ... I977. However, for the following reasons, the same type of switches used for overtravel limits are
recommended:
- Normally closed switches are proven to have greater electrical noise rejection than normally open types.
- Using the same type of switches for every input flag simplifies maintenance stock and replacements.
+Lim
AGnd
+15V
51
59
58
JMACH1
+Lim
AGnd
51
58
JMACH1
+Lim51
JMACH1
DC
PC opt 1: JMACH2, PIN 59
Lite: JEQU, PIN 9
Mini: JAUX, PIN 13
12-24V
Dry Contact
12-15 Volts proximity 15-24 Volts proximity