CONTREX CX-1200 - Manual (Page 153)

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ALARMS STANDARD P1/3
Zero Speed
When the magnitude of the Fb EU/Tm (MP-06) is less than or equal to Zero Speed (CP-332), the Fb @
0Spd bit (54) in the PLC is set to “1”. This value, as well as the PLC Fb @ 0Spd bit condition, is used in
other transparent internal calculations that are based on feedback information.
Max Fb Alm
Maximum Feedback Alarm (CP-371) signals an over-speed condition. When the magnitude of the Fb EU/
Tm (MP-39) is greater than or equal to Max Fb Alm (CP-371), then the MaxFb Spd bit (55) in the PLC is
set to “1”. You can output this alarm for indication or action, or you can use the alarm logically in the PLC.
Min Fb Alm
Minimum Feedback Alarm (CP-370) signals an under-speed condition. When the magnitude of the Fb EU/
Tm (MP-06) is less than or equal to MinFb Alm (CP-370), then the LoSpdAlm bit (28) in the PLC is set to
“1”. You can output this alarm for indication or action, or you can use the alarm logically in the PLC.
Max Acl/Dcl
When either the feedback acceleration or the deceleration is greater than or equal to Maximum Accel/Decel
(CP-372), then the MaxAclDcl bit (56) in the PLC is set to “1” . You can output this alarm for indication or
action, or you can use the alarm logically in the PLC.
NO Resp Time
When the CO_Sig output signal is greater than 1/16 CO Max Volts (CP-271) and the Fb EU/Tm (MP-06) is
less than Zero Speed (CP-332) for longer than the No Response Time (CP-373), then the DrvNoRsp bit (57)
is set to “1”. If this scenario occurs, it is generally an indication that the feedback has been lost. It can also
indicate that the drive is not enabled (or faulted out), that the CO_Sig output signal is not getting to the drive
or that there may be a physical obstruction preventing motion.
Posn Alarm
Position Alarm (CP-374) sets a threshold for the magnitude of position error above which the Position Alarm
PLC bit is set = 1. In other words...if the magnitude of PosErr (CP-33) is greater than or equal to the value
set for Posn Alarm (CP-374), then the Position Alarm PLC bit (65) will be set.