C.6.2 configuration word bit map – Delta RMC101 User Manual

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Appendix C: Parameter Field Reference

C-79

This bit affects what happens when the module loses contact with the Programmable Controller.
When this bit is set, the module will finish any move it has started, otherwise it will halt
immediately upon detecting loss of contact with the PLC. This is useful for finishing a move that
must complete to prevent machine downtime (for example, a partial shot in an injection-molding
machine).

Bit 3 - Simulate bit
When this bit is set, the drive output is set to zero and the magnetostrictive transducer inputs are
ignored. Internally the Target Position is used as the Actual Position. This mode is used for
debugging. (The transducer error bits and LEDS will be cleared.)

Note:

Drive output is always 0 volts while in simulate mode; no commands, including open loop,

will change this.

Bits 1 - 2 - Prescale Divisor Bits
Prescaling may be desired on systems with long strokes. The prescale bits are used along with
the Scale parameter to convert Transducer Counts to Actual Position. The effect is to divide the
Scale by 1, 2, 4, or 8. The divide-by factor is specified as follows:

Counts

Bit

The advantage of these bits is that they let you maintain a higher resolution in the Scale
parameter. For example, a Scale of 31027 and a divide-by of 4 gives an effective scale of
7756.75. Without using the divide-by bits, the Scale would have to be rounded up to 7757, which
has less resolution—with a 64" rod, the rounded value would make a 0.002" error at 64". Note:
The stroke is always limited to 220 inches due to the 18-bit transducer counter resolution.

These bits must be zero for Resolver modules.

Bit 0 - Integrator Limit
When this bit is cleared, the integrator limit is 20% of full drive. When the bit is set, the limit is
80%. If the integrator tries to go above the limit, the Integrator Windup bit in the status word is set
and the integrator value is held at the limit. The integrator limit is designed to prevent the drive
output from saturating.

Note:

The actual drive output may be reduced based on the values of the Extend Feed Forward

and Retract Feed Forward .

C.6.2 Configuration Word Bit Map

The axis Configuration word contains 16 bits of information. The hexadecimal table below
provides an easy way to convert hexadecimal numbers to bit patterns.

This manual is related to the following products:

RMC100