Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 154

Restrictions
• With two-way cam pattern operation, if the corresponding cam axis current value per cycle is not found, minor error (error
code: 1C28H) will occur and synchronous control will not be started.
• When starting synchronous control, the current feed value may change slightly from its original position at starting
synchronous control. This is due to the readjustment of the position based on the restored cam axis current value per cycle.
This does not result in position displacement.
• With a feed operation cam pattern, if the corresponding cam axis current value per cycle is not found on the first cycle, the
cam reference position is changed automatically and the pattern is searched again.
• If the cam resolution is large, or many axes are started at once, search processing may take a long time when starting
synchronous control. When this occurs, change the operation cycle to a larger value.
Number of axes
1
8
16
32
64
• If "degree" is the unit for the current feed value of the output axis, the current value is not restored in a cam stroke range
that straddles 0[degree] and a minor error (error code: 1C28H) occurs. Execute cam axis current value per cycle restoration
within a cam stroke range exceeding 0 and less than 360[degree].
7 SYNCHRONOUS CONTROL INITIAL POSITION
152
7.3 Cam Axis Position Restoration Method
Cam resolution
256
0.44[ms]
1.78[ms]
3.55[ms]
7.10[ms]
12.4[ms]
32768
12.2[ms]
94.4[ms]
249[ms]
483[ms]
831[ms]