M-Series Operator’s Manual 4/9/15
If Parameter 51 = 11 and you program a G2 arc with a radius of 100 mm at a feedrate of 2500 mm/min, then the actual
feedrate of the arc will remain unmodified at 2500 mm/min because the arc radius is outside both ranges specified by
Parameters 49 and 50, and therefore this feature does not affect such arcs.
Examples (in inches):
Parameter 49 = 50.0050 (rrrr = ½ inch, ffff = 0010)
Parameter 50 = 200.1500 (RRRR = 2 inches, FFFF = 1500)
If Parameter 51 = 31 and you program a G2 arc with a radius of ¼ inch at a feedrate of 100 inches/min, then the actual
feedrate of the arc will be lowered down to 10 inches per minute.
If Parameter 51 = 23 and you program a G3 arc with a radius of 1.5 inches at a feedrate of 200 inches/min, then the
actual feedrate of the arc will be lowered down to 30 inches/min (=200 x .1500).
If Parameter 51 = 33 and you program a G3 arc with a radius of 1.75 inches at a feedrate of 300 inches/min, then the
actual feedrate of the arc will be lowered down to 78.75 inches/min (= Arc radius x .FFFF x Programmed feerate =
1.75 x .1500 x 300).
If Parameter 51 = 11 and you program a G2 arc with a radius of 3 inches at a feedrate of 250 inches/min, then the
actual feedrate of the arc will remain unmodified at 250 inches/min because the arc radius is outside both ranges
specified by Parameters 49 and 50, and therefore this feature does not affect such arcs.
Parameter 56 – Feedrate Override Display Properties / Inverse Time interpretation
Bits 1 and 2 define how the federate override is displayed in the status window. Bit 3 selects the meaning of inverse
time feedrates (F) when inverse time mode (G93) is active. Bit 0 is unused.
Bit Function Parameter Value
0 Not used
1 Display programmed rate not actual 2 = Yes; 0 = No
2 Display a bar meter of percentage 4 = Yes; 0 = No
3 Inverse time meaning of F 8 = F is in inverse seconds, 0 = F is in inverse minutes
Parameters 57 – Use Generic Load Meter Data from PLC
If load meters are enabled (via parameter 143) the data being displayed for each axis is normally calculated from its
PID output (either real or simulated). However, if any axis has its corresponding bit set in this parameter, then the data
going into the load meter will come from the PLC system variables SV_METER_1 - SV_METER_8 (corresponding to
axes 1-8). Furthermore, if an axis is a spindle axis (as set by parameter 35) the load meter data will be displayed on the
spindle override meter in the Status Window.
Cooperation from the PLC program is required for this feature to work. The PLC program needs to send back a value
between 0.0 and 100.0 via floating point system variables SV_METER_1 - SV_METER_8 (corresponding to axes 1-
8). Note that there is future support for SV_METER_9 up to SV_METER_16, but for now there is support for up to
only 8 axes.
Parameters 61-62 - Stall Detection Parameters
The M-Series control will detect and report several stall conditions. The low power stall occurs if the control has been
applying a specified minimum current for a specified time, and no encoder motion has been detected. This may
indicate a loose or severed encoder cable. A high power stall occurs if the control has been applying at least 90%
current for a specified time, and no motion greater than 0.0005" has been detected. This may indicate a physical
obstruction. Note that this feature will only work with torque mode drives and not velocity mode drives.
Parameter 61 is the time limit, in seconds, for a high power stall. The default is 0.5 seconds.
Parameter 62 is the PID output threshold for a high power stall. The default is 115.
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