After the Hardware connection check and setup of the Mitsubishi CNC control system is completed and the system is powered on, the "READY" green light on the display still does not light. Moreover, a lot of alarm contents are displayed on the [Diagnostics]-[Alarm] screen, which makes the debugging engineer who used the Mitsubishi CNC for the first time confused. And Mitsubishi CNC has more than 700 parameters, which ones must be set when booting? How to solve the fault alarm? This article explains the above problems based on the debugging experience, in order to help the commissioning engineer.
1. Boot parameters
1.1 Setting of basic parameters The original system displays Japanese after power on. For easy operation, set parameter #1043=22 (Simplified Chinese) first. (Some systems such as C64 do not have Simplified Chinese specifications, then set #1043=15 Traditional Chinese).
Set #1138=1 (select parameter with parameter number), after inputting the parameter number, the screen will immediately switch to the parameter screen.
The following are the parameters that must be set after booting:
#1001 - Whether the setting is a single system or a dual system and the presence or absence of a plc axis.
#1002——Set the number of axes of the NC axis and PLC axis.
#1013 - Set the name of each axis.
#1037——G code system and compensation type (milling machine: #1037=2, lathe #1037=3)
(This parameter must be set before executing #1060 formatting)
#1060 - This parameter is especially important. Its function is "execute the initialization of system startup"
The function has 2: one is to initialize the parameters according to the set value of #1001——-#1043. The significance is that the number of NC axes and the number of spindles have been set in #1001——-#1043. After #1060 is set, the parameters of each servo axis and spindle are automatically displayed on the screen. Otherwise, the parameters of each servo axis and spindle are not called up.
The second is to format the machining program and tool compensation data. And enter the standard canned cycle.
After setting the #1001——-#1043 parameter accurately, you must set #1060 as prompted. #1155=100#1156=100
The fixed signal address specified by the Mitsubishi NC system is as follows:
1-axis origin X181 axis + limit X281 axis - limit X20
2-axis origin X192 axis + limit X292 axis - limit X21
3-axis origin X1A3 axis + limit X2A3 axis - limit X22
4-axis origin X1B4 axis + limit X2B4 axis - limit X23
If the input signal address occupied by the home switch and the limit switch is different from the system specification, it must be changed by setting parameters.
#2073——Set the origin signal address
#2074-Set the positive limit signal address
#2075-Set negative limit signal address
BIT5=1 of #1226 (make the above settings valid)
1.2 Servo motor parameter setting:
#2219-(Location encoder resolution)
#2220=――(Speed ​​encoder resolution)
#2225=―-(Motor model)
#2236-(The connected regenerative braking resistor or power unit model)
1.3 Parameters related to the spindle When the system is equipped with a spindle, the following parameters must be set:
#1039-(Set the system with several spindles);
#3024-(Set the connected spindle type
#3024=1.Bus connection is the servo spindle)
#3024=2Analog output is the inverter spindle)
#3237=0004(PLG is valid)
#3238=0004#3025=2 (Encoder feedback series communication is valid. Display the actual spindle speed)
#3239——Spindle servo drive type
#3240——Spindle motor type
#3241——Type of brake unit or brake resistor connected
1.4 PLC parameters
#6449=00000011——The counter in the PLC program, the timer is valid.
#6450=00000101 - The alarm information and operation information take effect.
#6451=00110000——PLC program communication is valid.
Mitsubishi NC has up to 700 parameters, which are not required and cannot be set at boot time. The above parameters must be set after power on.
2. Common fault alarms after starting up and after troubleshooting, many fault alarms may be displayed on the [Diagnostics]-[Alarm] screen, and some alarms are not the same as the actual ones, and need to be analyzed and judged to be released.
2.1[M010006XYZ] - This fault alarm indicates that one axis or three axes all exceed the hard limit.
Phenomenon: The actual situation is that each axis has not moved and does not touch the limit switch.
Fault analysis and troubleshooting:
A. The limit switch signal address is connected according to the system, but it is connected to the normally open point, and the system detects the overtravel fault.
Disposal: Simply connect the limit switch to the normally closed point and the fault is eliminated.
B. The limit switch signal addresses are not connected according to system specifications.
Disposal: Set parameters #2073, #2074, #2075, #1226, and connect the limit switch signal to the normally closed point.
2.2
[S022219XYZ],
[S022220XYZ],
[S022225XYZ],
[S022236XYZ] - The initial parameter setting is incorrect.
Disposal: This means that the servo parameters set after power-on are incorrect, and should be set according to the motor or encoder model.
2.3[Y03MCPXYZ]——The servo drive is not installed. The actual situation is that the servo drive is installed. Why is this type of alarm?
Analysis and disposal:
1. Each connecting cable is not tightly inserted, and the cables are unplugged and then re-inserted.
2. If a cable is faulty, replace the cable.
3. The power-on sequence is incorrect. The servo system should be powered first, and finally the controller should be powered.
4. The axis number of the drive is set correctly. Or the terminal plug is not connected.
2.4[Z55-RI/O not connected]
Phenomenon: The actual situation is that the system is not equipped with RI/O at all. In another case, the system is indeed equipped with RI/O and the connection is completed. But why is there such an alarm?
Analysis: â— The order of power-on is incorrect. The controller is powered up and then the RIO is powered up. As a result, the controller does not detect RIO.
â—. The main cable CF10 (controller - basic I/O) is not properly connected.
Disposal:
1. Change the power-on sequence.
2. Re-insert the CF10 cable.
3. Check the Power Supply to the RI/O.
2.5[EMGLINE] - Analysis of emergency stop failure due to improper connection: It may be that the failure of a connection cable may also be a connection failure.
Disposal: Re-insert and rewire each cable. Or replace the SH21 cable with R000
cable. Generally, there are 10 wires in the SH21 cable, but the R000 cable must be used for the C1 driver. The R000 cable must be full of 20 wires.
2.6[EMGSRV] - Emergency stop analysis due to servo system failure:
1. SH21 cable disconnection may cause this fault. This fault may also occur when the SH21 cable is poorly connected.
2. The fault will also occur if the power-on sequence is incorrect.
Disposal: Replace the SH21 cable and power it up in the normal order.
2.7 [EMGPLC] - Emergency stop treatment caused by PLC program: Monitor the cause of Y29F=ON caused by the PLC program, and cancel the fault that caused the emergency stop.
2.8[EMGSTOP] - The PLC program is not running.
Disposal: 1. Check if the “NCSYS†knob behind the controller is =1â€
Set this knob to "0"
2. Set PLC = "RUN" on the display.
3. After executing “Format PLC Memory†on the communication screen of GX-D software, re-incoming the PLC program.
2.9[U01——-No user PLC] - PLC program has not been input: input PLC program.
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