Yaskawa MP940 Hardware Manual - Manual (Page 22)

MotionSuite™ MP940 Machine Controller Hardware Manual Section 4: LED Indicators
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Section 4: LED Indicators
LED Display
The MP940 runs a series of tests during start-up. If an error is detected, the ERR LED
flashes, and the content of the error corresponds to the number of flashes.
MotionSuite™ software tools cannot communicate with the controller while an error
LED is flashing or memory initialization is occurring. The MP940 LEDs are shown in
the following table.
In addition, there are the following four LEDs.
LED Display Patterns
Type
LED
Meaning
RDY
(Green)
RUN
(Green)
ERR
(Red)
BAT
(Red)
Normal ON OFF OFF OFF Application program stopped
ON ON OFF OFF Normal application program execution
Error OFF OFF ON OFF Memory error (initialization may be required)
OFF OFF OFF OFF Initial operation (when display continues)
OFF OFF Flashing OFF
1. 2 flashes: RAM error
2. 3 flashes: ROM error
3. 4 flashes: Peripheral LSI letter
Warning — — — ON Battery alarm
ON ON ON OFF 1. Operand error or I/O error
System (S) register message
(no LED display) Hardware status (Momentary Stop, RUN/STOP, Test-
ing Mode, etc.)
Other Flashing Flashing OFF OFF Memory initialization by DIP switch setting complete.
OFF OFF ON OFF Offline testing mode.
Description Type Color Meaning
PRT1 RS232 Green Flashes to indicate communication
PRT2 RS422 Green Flashes to indicate communication
TX Mechatrolink Green Flashes to indicate communication
RX Mechatrolink Green Flashes to indicate communication