Data Transfer Process; Plc, 20Ssc-H And Servo Amplifier - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
6.3

Data Transfer Process

6.3.1

PLC, 20SSC-H and servo amplifier

The data transfer between PLC, 20SSC-H, and servo amplifier is as follows.
FX /FX PLC
3U 3UC
(B)
Sequence
program
1. Power-on data transfer process [A in the figure above]
The following data transfer process occurs.
1) The data in the flash memory of 20SSC-H is transferred to the buffer memory (BFM).
2) The servo parameters are transferred to the servo amplifier.
To transfer the servo parameters automatically to the servo amplifier at PLC power-on, set the following
parameter in flash memory and turn the power ON in order from the servo amplifier to 20SSC-H
(including the PLC).
- Save servo parameters that relate to the servo amplifier with the servo series (BFM #15000, #15200), to
the flash memory.
2. Data transfer between PLC and buffer memory (BFM) of 20SSC-H [B in the figure above]
Applied instructions such as the MOV instruction, or the FROM/TO instruction are used to read/write
parameters and data between the PLC and buffer memory.
Note
Use FX Configurator-FP, whenever possible to set positioning parameters, servo parameters and table
information, and save the setting data in the flash memory.
The use of the sequence program for this purpose requires many steps and devices, resulting in a complex
program and increased scan time.
3. Writing data to the flash memory in 20SSC-H [C in the figure above]
To change data in the flash memory, use a sequence program or FX Configurator-FP to modify the buffer
memory data, then activate a save command (BFM #523 b0 to 6) to save positioning parameters, servo
parameters and table information from the buffer memory to the flash memory.
→ For the operation of FX Configurator-FP, refer to the FX Configurator-FP Operation Manual.
4. Data transfer process between 20SSC-H and servo amplifier [D in the figure above]
When servo parameters or monitor data on the servo amplifier side are modified, the buffer memory of
20SSC-H is automatically updated.
For the initial servo parameter transfer method, refer to the following.
F X -20SSC-H
3 U
Buffer memory (BFM)
- Positioning parameter
- Servo parameter
- Table information
- Monitor data
- Control data
(C)
(A)
Flash memory
- Positioning parameter
- Servo parameter
- Table information
→ For the flash memory save command, refer to Section 11.4.15
→ For the initial servo parameter transfer method, refer to Section 6.3.3
6 Memory Configuration and Data Operation
6.3 Data Transfer Process
(A)
(D)
Servo amplifier Servo amplifier
- Servo parameter - Servo parameter
- Monitor data - Monitor data
→ For details, refer to Subsection 6.3.3
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