DCS 500 manual 134, 136, 137, 138, 140

Chapter 4 - Signals and Troubleshooting

	Code		Text on		Definition /		Signal		Remark
	seven		LCD of control panel		Possible source		number
	segm.
			CDP 31x				(ALARM_WORD_1/2)
	display
A 134		Backup not allowed			Alarm Change of Parameter Set not allowed	11105		bit 4
					Signal will appear when an attempt has
					been made to change from Motor Set 1 to
					Motor Set 2 or vice versa, e.g. while the mo-
					tor shaft is turning or the line contactor is
					switched on.
A 136		Write backup alarm			Alarm Write Backup of Values in Non-Volatile	11105		bit 5
					Memory failed
					The attempt to save values in non-volatile
					memory has failed;
					parameter memory could not be erased.
					Check: - Is Jumper S3 enabling the save
					routine?
A 137		Arm. current ripple		Armature current ripple		11105		bit 9	Can
				One or several thyristors carry no current.					not be re-
									set
				Check: - Current feedback with oscilloscope
					(6 pulses within one cycle visible?)
					- Branch fuses, thyristor gate con-
					nection; gate-cathode resistance.
					- Sensitivity of monitoring function:
					set CUR_RIPPLE_LIM [421] (de
					pending on the methode; see F34)
A 138		Init values read			Alarm Initializiation Values read			
					Default values have been loaded, using
					Parameter [P 11202], Value 3 (FACTORY_
					SET_VALUE); signal may only be entered in
					the Fault Logger.
A 140			Auto-reclosing		Auto-Reclosing (Self-Restart)	11105		bit 8
					This alarm indicates when self-restart is per-				modified
					formed. During that time the alarms F29,				in
									S21.232
					F31, F39 and F41 are suppressed. This
					function is started when the line voltage
					drops below the alarm or error threshold,
					when not in synchronism, no field or no line
					contactor acknowledgement and with
					PWR_LOSS_MODE [9.19] = enable and
					PWR_DOWN_TIME [5.10] greater than
					zero.

DCS 500B / DCP 500B Operating Instructions IV A 4 - 15

3ADW000055R0401_DCS500B_Operating Instruction_e_d