Mitsubishi Electric RD77MS2 User Manual page 549

(1) Transmitting data when power is turned ON or CPU module is reset
When the power is turned ON or the CPU module is reset, the "parameters area (c)
and "servo parameter" stored (backed up) in the flash ROM/internal memory (nonvolatile) are transmitted to the buffer
memory and internal memory.
*1 Parameter area (c):
Parameters validated with power supply ON/CPU module reset.
([Pr.96], [Pr.97], [Pr.100], [Pr.116] to [Pr.119], [Pr.150] to [Pr.153], [Pr.800] to [Pr.807])
(2) Transmitting data with TO command from CPU module
The parameters or data is written from the CPU module to the buffer memory using the TO command
At this time, when the "parameter area (b)
are written into the buffer memory with the TO command, it is simultaneously valid.
*1 "Positioning data (No.101 to 600)" and "Block start data (No.7002 to 7004)" can be set with only the engineering tool.
*2 Parameter area (b):
Parameters validated with next each positioning control is started.
([Pr.8] to [Pr.10], [Pr.25] to [Pr.42], [Pr.84])
When a value other than "0" has been set to the servo network composition parameter "[Pr.100] Connected
device" inside the internal memory (nonvolatile), the power is turned ON or CPU module is reset to transmit
the servo parameter inside the internal memory (nonvolatile) to the servo amplifier (servo amplifier LED
indicates "b"). After that, the TO instruction writes the servo parameter from the CPU module to the buffer
memory so that the servo parameter in the buffer memory is not transmitted to the servo amplifier even if the
PLC READY signal [Y0] is turned OFF then ON. Change the servo parameter with the above method, after
setting the servo network composition parameter "[Pr.100] Connected device" inside the internal memory
(nonvolatile), to "0".
(3) Validate parameters when PLC READY signal [Y0] changes from OFF to ON
When the PLC READY signal [Y0] changes from OFF to ON, the data stored in the buffer memory's "parameter area (a)
validated.
*1 Parameter area (a):
Parameters validated when PLC READY signal [Y0] changes from OFF to ON.
([Pr.1] to [Pr.7], [Pr.11] to [Pr.24], [Pr.43] to [Pr.57], [Pr.81] to [Pr.83], [Pr.89] to [Pr.95], [Pr.100], [Pr.116] to [Pr.119], [Pr.122], [Pr.123],
[Pr.150], [Pr.151], [Pr.153])
The setting values of the parameters that correspond to parameter area (b) are valid when written into the
buffer memory with the TO command. However, the setting values of the parameters that correspond to
parameter area (a) are not validated until the PLC READY signal [Y0] changes from OFF to ON.
(4) Accessing with FROM command from CPU module
The data is read from the buffer memory to the CPU module using the FROM command
*1 "Positioning data (No.101 to 600)" and "Block start data (No.7002 to 7004)" can be read with only the engineering tool.
(5) Reading the servo parameter from the servo amplifier
When the parameter of the servo amplifier is changed, the servo parameter is read automatically from the servo amplifier to
the buffer memory/internal memory and internal memory (nonvolatile).
*2
", "positioning data", "block start data", "control data" and "PLC CPU memo area"
*1
", "positioning data", "block start data"
*1
.
*1
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12 DATA USED FOR POSITIONING CONTROL
12.9 Memory Configuration and Data Process
12
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