July 2013 7.6 Monitoring functions 1087
7.5 PLC cycle time
On the CC 61xx, the PLC cycle time is a multiple of the HSCI cycle time (3 ms).
Minimum possible value is therefore 12 ms.
Enter the PLC cycle time in ms in MP7602.
MP7602 PLC cycle time
Input: 0 to 60 [ms]
0 to 12: 12 ms
7.6 Monitoring functions
The KTY temperature sensor of the motors is monitored by the control for
excessive and insufficient temperatures. If the KTY is not to be evaluated (e.g.
because the temperature sensor is not doubly isolated), this function must be
deactivated with MP2220.x bit 4 = 1.
The CC 61xx monitors the input frequency of the speed encoders. If this
monitoring leads to problems (e.g. unjustified responses), it can be
deactivated with MP2220.x bit 7 = 1. The following error messages can
appear:
Speed encoder: 8860 Input frequency from speed encoder <axis>
Position encoder: 8870 Input frequency from position encoder <axis>
Only one encoder is used for capturing the speed and position when linear and
torque motors are being used. If such an axis is removed from the closed-loop
control and later reintroduced, a mechanical offset can occur. This offset is not
fixed "in one blow," but instead is adjusted by gradually raising the k
V
factor
from 0 to the original value. This function is deactivated with MP2220
bit 8 = 1.
MP2220.x Monitoring functions
Input: Bit 4 – Monitoring for excessive temperature
0: Active
1: Inactive
Bit 5 – Monitoring for insufficient temperature
0: Active
1: Inactive
Bit 6 – Reserved
Bit 7 – Monitoring of encoder input frequency
0: Active
1: Inactive
Bit 8 – Adjust mechanical offset by gradually increasing the k
V
factor
0: Active
1: Inactive
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