Lenze Drive PLC Developer Studio 9300 Servo PLC (V8.x) - Manual (Page 94)

2.12 MCTRL_MotorControl (node number 131)
9300 Servo PLC
System blocks
2−80
L
9300 Servo PLC EN 5.0
2.12.17.16 Sd8 − sin/cos encoder monitoring during operation
This monitoring function performs a plausibility check to find out whether the encoder is available and
the sin/cos tracks supply plausible values with regard to each other.
Error Monitoring function System variable Possible responses
No. Display TRIP Message Warning FAIL−QSP Off
x088 Sd8 Absolute value encoder error MCTRL_bSinCosFault_b ü ·
· Lenze setting
ü Setting possible
·
The following sin/cos encoder types are supported:
– Stegmann SCS 60/70 ST 512 single−turn absolute value encoder (512 inc/rev)
– Stegmann SCM 60/70 ST 512 multi−turn absolute value encoder (512 inc/rev)
·
The error "Sd8" can only be reset by mains switching.
·
It may be necessary that the encoder has to move a few angular degrees for triggering an
error.
·
The response is set under C0580:
Code LCD Possible settings IMPORTANT
Lenze Selection
C0580 MONIT SD8 3 Monitoring configuration: Sin/cos
encoder
0 TRIP
3 Off
Note!
If the encoder is to be monitored and, especially, if synchronous machines are used, the error
response should be set to "TRIP".
For further encoder reliability, the monitoring of following errors can, for example, additionally be
activated for positioning systems. This error response should also be set to "TRIP".
Apparent errors Hidden errors
·
Unplugged connectors, all encoder signals open.
·
Single open circuit, one of the following signals is missing:
– COS A
– RefCOS A
– SIN B
– RefSIN B
– GND
– VCC
·
Double open circuit with the following signal pairs:
– COS A and RefCOS A
– SIN B and RefSIN B
– COS A and SIN B
– RefCOS A and RefSIN B
– or all four signals (COS A, RefCOS A, SIN B, RefSIN B) open.
·
Short circuits, especially between the sine and cosine signals.
·
Cable/encoder interferences with intermediate values
·
"Semi"−short circuits (> 0 Ohm)
·
"Semi"−interruptions (< infinite)