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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 471
Issue Number: 1
Spd / Dir Select Speed / direction sequencing problem
81
The Spd / Dir Select trip indicates a sequencing problem caused by one of the following scenarios:
• The direction and speed are still selected at the end of travel in state 14 after 4s. Remove the speed or direction signals
to reset the trip.
• When Control Input Mode (H11) = Analog Run Prmit (0), the Run Permit signal using Direction Input 1 CCW (G39)
must be removed at the end of travel.
• When Control Input Mode (H11) = Analog 2 Dir (0), Priority 2 Dir (4) or Binary 2 Dir (5) the direction signals (Direction
Input 1 CCW (G39) or Direction Input 2 CW (G40)) OR the speed selection (Reference Select Bit 0 Input (G32) to
Reference Select Bit 6 Input (G38)) must be removed at the end of travel.
• When Control Input Mode (H11) = Priority 1 Dir (2) or Binary 1 Dir (3) the speed selection (Reference Select Bit 0 Input
(G32) to Reference Select Bit 6 Input (G38)) must be removed at the end of travel.
• When Control Input Mode (H11) = Control Word (6), the direction signals (Control Word (G51) Bit 10 or Bit 11) OR the
speed selection (Control Word (G51) Bit 0 to Bit 9) must be removed at the end of travel.
Speed err Excessive following speed error
62
Open loop mode
For Open loop mode excessive following speed error is detected, and a trip generated, when the drive enters and operates
in current limit for the time defined in Maximum Speed Error Threshold (H15). Maximum Speed Error Threshold (H15)
defines the allowable time to operate in current limit prior to the trip being generated, selecting very high values will result in
the Speed err trip being disabled.
RFC-A and RFC-S
The speed error is calculated from the difference between Profile Speed (J39) and Actual Speed (J40). The calculated
speed error is then compared with the speed error threshold in Maximum Speed Error Threshold (H15) and where the
threshold is exceeded for more than 100 ms a trip is generated.
The speed error during a travel is displayed in Maximum Speed Error (J57) independent of the activation of the speed error
detection and this is reset to 0 at each start.
Recommended actions:
• Possible causes for the speed error trip can be due to the following
Motor
Check motor power connections and phase rotation
Check motor brake control
Check Elevator safety gear
Position feedback
Check position feedback mechanical mounting
Check position feedback phase rotation
Check position feedback wiring arrangement, risk of induced noise
Position feedback device failure, replace feedback device
Drive set-up
Check motor details and parameter set-up, including current limit
Check position feedback device parameter set-up
Check position feedback device phase offset, static autotune has been completed
Check speed control loop gain settings where motor instability exists
• Increase the Maximum Speed Error Threshold (H15)
• The following speed error detection can be disabled by setting Maximum Speed Error Threshold (H15) = 0
STO Ctrl err Safe Torque Off (STO), Drive enable control sequence error
66
The Safe Torque Off (STO), Drive enable input sequence is incorrect i.e. the Safe Torque Off (STO), Drive enable was not
removed a the end of the travel following motor contactor control and after 4 s, or applied during the start of a travel
following motor contactor control and after 6 s.
Recommended actions:
• Check for correct control connection of Safe Torque Off (STO), Drive enable to T31 on the drive
• Check parameter F10 T31 STO Input 1 State (F10) Safe Torque Off (STO), Drive enable input sequence during start /
stop
• Check correct operation of output motor contactors and auxiliary contacts
• Check OPEN / CLOSE delay time of output motor contactors
• Check motor contactor delay in Motor Contactor Measured Delay Time (B32)
Trip Diagnosis
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