Mitsubishi Electric MELSEC Q Series User Manual page 83

(b) Necessary preparations for each diagnostics
Before performing each hardware diagnostics test, take the steps listed below.
• When executing Mode 0
Perform all preparation tasks for executing the following mode from 1 to 6.
• When executing Mode 1
Back up all data in the standard ROM and battery backup RAM data.
Remark
● Backup of data in the standard ROM
Use the FTP function to backup the standard ROM data to the PC. (Page 197, Section 12.1.2)
● Backup of battery backup RAM data
From [Online]  [Battery backup RAM monitor] in Setting/monitoring tools for the C Controller module, or by using the C
Controller module dedicated function (CCPU_ReadSRAM function), read out the contents and save data in any location
other than in the standard ROM, e.g. your PC.
• When executing Mode 2
Built-in Ethernet port (CH1 and CH2) by an Ethernet cable (crossing cable).
• When executing Mode 3
Install a CompactFlash card.
• When executing Mode 4
Connect a cable to RS-232 connector (CH3) as shown below.
The table below shows the connector pin positions and cable connection.
Signal
Pin No.
code
1 CD(DCD) Data Carrier Detect
2 RD(RXD) Received Data
3 SD(TXD) Transmitted Data
4 ER(DTR) Data Terminal Ready
5 SG Signal Ground
6 DR(DSR) Data Set Ready
7 RS(RTS) Request To Send
8 CS(CTS) Clear To Send
9 CI(RI) Ring Indicator
10 SG Signal Ground
• When executing Mode 5
Check that no cable is connected to the USB connectors.
• When executing Mode 6
No preparation tasks for this mode.
Cable
Signal name
connection
CHAPTER 6 HARDWARE OPERATIONS
Q12DCCPU-CBL
C controller module
4
8
1
5
2
9
6
10
3
7
6
RS-232 device
side
1
6
2
7
3
8
4
9
5
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