Zapi EPS-AC, Operating And Users Manual, Page: 42 / 52

Page 42
6) MICRO SLAVE #5
Cause: Means the SM has detected the motor is standing while the
command is not at rest.
Remedy: If the alarm occurs permanently, it is necessary to substitute the
logic.
7) MICRO SLAVE #6
Cause: Means the SM has detected the motor turning direction is opposite to
the tacho command. (Command and action disagree. Only for a
tacho or stepper motor controlled steering).
Remedy: If the alarm occurs permanently, it is necessary to substitute the
logic.
8) MICRO SLAVE #7
Cause: Means the SM has opened its safety contact but has not specified
the reason on the local status bus. For example it occurs when the
SM is absent or broken.
Remedy: If the alarm occurs permanently, it is necessary to substitute the
logic.
9) KM CLOSED
Cause: It occurs when the MM has detected its safety contact closed prior to
being commanded.
Remedy: The alarm can be due to a wrong installation. As figure 11.1.1.1
shows two cascaded safety switches are internally connected. They
have three diagnostic points; low voltage, mid point and high voltage
end that are read by software. When the switches are open, the
three diagnostic points expect to be at different potential values
thank to the resistances. If the outside interface connected on pin #1
and pin #7 of connector CNB gets one end equal to the midpoint, it
looks like the switch is closed before it is driven and this unwanted
alarm occurs. So we recommend the safety switch should be directly
connected to the supply source (plus battery or minus battery) with
no interposed switches.