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4.5 MRESET and Reset to Factory Settings
4.5.1 MRESET
• The CPU is set to the Ready state.
• The working memory is unloaded, but the user program remains in the overlay file system.
• The non-volatile memory for retentive data is deleted.
1. Switch your CPU to STOP state.
2. Push the operating mode switch down to position MR.
3. Release the operating mode switch after 3 seconds and press it back to the MR position
within 3 seconds.
4. Release the operating mode switch after 3 seconds.
• The CPU now executes a MRESET.
• To confirm, you will receive a diagnostic message that a MRESET was executed. You can output e.g.
in iCube Engineer via [Notifications] in the [Cockpit] editor.
4.5.2 Reset to Factory Settings Type 1
• The CPU is started in Standard Mode.
• The overlay file system with user program, configurations, user data and firmware adjustments is deleted.
• The non-volatile memory for retentive data is deleted.
• The current firmware version remains, but all changes to it are discarded.
(1) When Using Operating Mode Switch S3
1. Switch OFF the power supply of the CPU
2. Press and hold the operating mode switch in position MR and switch on the power sup-
ply of the CPU again.
3. As soon as the LEDs show the following behavior after start-up, release the operating
mode switch again:
LED Behavior
RDY
(green)
Resvd
(yellow)
RN
(green)
ER
(red)
IO ER
(red)
IO
DIAG
(red)
PN-C
ER
(red)
PN-D
ER
(red)
SD
(yellow)
EC
RN
(green)
EC ER
(red)
Not lit
Not lit
Flashing
green
1 Hz
interval
Lit
Not lit
Not lit
Not lit
Not lit
Not lit
Not lit
Not lit
The CPU now executes a reset to factory setting type 1.
(2) When Using DIP Switch S1
1. Switch OFF the power supply of the CPU.
2. Set the S1 DIP switches S1-1 and S-2 under the front flap to the following position:
4.5 MRESET and Reset to Factor
Settin
s
Terminal Setting Action
S1-1 OFF
After power is switched ON the CPU executes a reset to factory
settings type 1.
S1-2 ON
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