NSK EDD Megatorque Motor - Alarm F4: Emergency Stop; Warning F5: Program Error

11. Alarm and Warning
— 11-19 —
11.3.19. Alarm F4: Emergency Stop
 This alarm does not report a problem of the Motor System. This alarm is the input signal for emergency
stop to the Driver Unit from the user device side.
 During the state of emergency stop, the Motor servo is off and the dynamic brake functions to
stop the Motor motion.
 Deactivation of the emergency stop input clears this alarm.
Table 11-28: Cause and remedy for the alarm F4
Cause
Remedy
(1)
Wrong setting of the input EMST signal
port polarity.
 The shipping set of the input EMST port is normally closed contact. If the
port is not connected the alarm occurs.
Refer to “3.4.3. Polarity Setting of Control Input Port (Normally Open
Contact and Normally Closed Contact)”.
(2)
EMST signal is inputted.
 Take measures against the problem, and then clear the EMST input.
(3)
Defective wiring
 Check wiring between the input EMST to the Emergency .Stop switch.
 Check the Emergency Stop switch itself.
(4)
Defective EMST switch
11.3.20. Warning F5: Program Error
 The program positioning operation is one of the positioning operations available for the Driver unit Model
EDD.
This warning occurs when the start and execution of the program specified by the user are not properly
performed.
 The command TA/HI identifies the cause.
Table 11-29: Cause and remedy for the warning F5
Alarm history
Cause
Remedy
F5 – 0
The System is executing other program.
 The input RUN (Program start) is disabled while the output BUSY (In-
operation) is closed.
 When a mechanical contact is used for the input RUN, check for chattering
that may cause two or more rising signals.
 Check if the input RUN is already ON due to noise.
 If the warning occurs due to causes above, increase the setting of the
parameter NW (Anti-chattering timer) of the port which is assigned to the
input RUN (Shipping set: PI5) referring to “8.1.3.1. Editing Control Input
Function”.
F5 – 1
There is no command is set in the
specified channel.
 Confirm if the selection of the program channel is right.
 Check if one of the input PRG0 to PRG7 is settled 1 [ms] before an input of
the RUN signal.
F5 – 2
A command that cannot be carried out in
the current condition is involved in the
channel program.
 For example, the Motor servo must be activated in case of a positioning
command to accept the input RUN.
 Refer to “9.3. Glossary of Command and Parameter” for conditions to
execute each command.
A data that is out of specification is set in
the channel program.
 For example, the warning F5 occurs if the positioning command AQ6 is set
to the program even the parameter QR (Dividing number, user scale) is set
to QR4 in a positioning operation with user unit.
F5 – 3
The input STP is ON, or an alarm or a
warning that prohibits execution of the
channel program.
 Confirm if the Input STP (Stop) is OFF.
 Confirm if an alarm or a warning is occurring.
(1) The input ACLR (Alarm clear) or the command CL (Clear alarm) clears the warning.