Computer Drive Installation Instructions

08.96 6 NC Machine Data (NC MD), NC Setting Data (NC SD)

6.6.4 Axis-specific MD bits 1 (axial bits 1)

Bit 4 The program can be started with NC START without approach to the

reference point of this axis.

Bit 3 of NC MD 5004 can be used to indicate whether reference point

approach is required prior to program start; this bit applies to all axes and

channels.

Active On: NC STOP

Bit 3, 2 May be set for rotary axes only! In JOG mode, bit 2 is used to choose

between rounding (positioning) to whole or to half degrees. Bit 2 = 1 means

rounding to whole degrees.

In AUTOMATIC or MDA mode, alarm 2064 is displayed for programmed

positions which do not represent a movement of 0.5 or 1 degree (rounding

for rotary axis incorrectly programmed). The occurrence of axis-specific,

spindle-specific or channel-specific alarms which result in opening of the

closed position control loop (removal of MODE GROUP READY), on RESET

and on EMERGENCY STOP, the control is no longer able to position the

rotary axis to a half or a whole degree. In this case, the rotary axis must not

be lowered into the serration.

Active On: NC STOP

Bit 1 Bit 1 = 1 This bit activates the function ”Dyn. SW limit switch for following axes”.

Active On: Power On

Bit 0 Alarm 132* is disabled. The cables to the encoder are no longer monitored

for cable breaks. An encoder failure or cable break is therefore not

immediately flagged, but rather with a greater delay in form of alarm 104*,

112* or 116*. Nor does the measuring circuit monitoring switch off the zero

and pulse code monitoring.

Active On: NC STOP

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SINUMERIK 840C (IA)