Reference Manual

PMAC 2 Software Reference

130 PMAC I-Variable Specifiation

I903, I908, ..., I978 Encoder n Flag Select Control Encoder I-Variable 3 {PMAC(1) only}

Range

0 .. 3

Units

None

Default

Remarks

This parameter determines which of the Flag inputs will be used for position capture (if

one is used – see I902 etc.):

Setting Meaning

0 HMFLn (Home Flag n)

1 -LIMn (Positive Limit Signal n)

2 +LIMn (Negative Limit Signal n)

3 FAULTn (Amplifier Fault Signal n)

This parameter is typically set to zero, because in actual use, the +/-LIMn and FAULTn

flags create other effects that usually interfere with what is trying to be accomplished by

the position capture. If you wish to capture on the +/-LIMn or FAULTn flags, you must

either disable their normal functions with Ix25, or use a channel n where none of the flags

is used for the normal axis functions.

Note:

The direction sense of the limit inputs is the opposite of what many

people consider intuitive. That is, the +LIMn input, when taken

high (opened), stops commanded motion in the negative direction;

the -LIMn input, when taken high, stops commanded motion in the

positive direction. It is important to confirm the direction sense of

your limit inputs in actual operation.