Omron CJ1W-NC271 - 12-2009, Operation Manual

Page: 253 / 687

225
Transferring PCU Parameters
Section 5-2
Note If an error occurs when reading data (multistart error or read transfer error),
the data will not be read from the PCU and the data in the read destination
area will not be refreshed. READ DATA can still be executed if an error occurs,
but even if the data is transferred normally, the error that occurred previously
will not be cleared. Make sure to execute ERROR RESET before executing
READ DATA to enable identifying whether the data that was read has been
transferred correctly.
5-2-3 Saving PCU Parameters
When the power is turned ON, the PCU reads the Common Parameters and
Axis Parameters saved in the PCU's flash memory to the PCU's internal
memory and starts operations. The PCU's parameters are saved to the PCU's
internal flash memory using the SAVE DATA Bit in the Common Operating
Memory Area.
Note (1) Save data to the PCU when MECHATROLINK communications are
stopped and the Data Transferring Flag is OFF. The PCU's data cannot
be saved while the Unit Busy Flag is ON (i.e., PCU initializing or reading/
writing Memory Card backup data).
(2) If SAVE DATA is executed during MECHATROLINK communications or
while data is transferring, a Multistart Error (Unit error code: 0021) will oc-
cur and data will not be saved to the PCU.
(3) Do not restart the PCU or turn OFF the power to the PLC while data is
being saved. Doing so may result in damage to the PCU's internal flash
memory and the PCU may not operate normally.
Data saving starts when the SAVE DATA Bit in the Common Operating Mem-
ory Area turns ON, at which time the enabled Common Parameters and Axis
Parameters are saved to the PCU's internal flash memory all at once. When
saving data to the PCU, make sure that the SAVE DATA Bit remains ON until
the Data Transferring Flag turns ON.
Common Operating Memory Area (Output)
n = CIO 1500 + (unit number
×
25)
Common Operating Memory Area (Input)
n = CIO 1500 + (unit number
×
25)
Name Word Bit Contents
SAVE DATA n 03 0
→
1: Starts saving data
Name Word Bit Contents
Data Transferring
Flag n+15 14 0: Powerup, saving completed, or saving
failed
1: Saving data
Unit Busy Flag n+16 14 0: PCU is not busy
1: PCU is busy
Connection Status
Flag 15 0: MECHATROLINK communications
stopped
1: MECHATROLINK communications exe-
cuting