Explanation - Omron C200HW Operation Manual

Exchanging Data

1-5-1 Explanation

Operating Memory Area
(IR Area)
Parameter Area
(DM Area)
Operating Data Area
Data Transfer Area
Internal Memory and
Flash Memory
14
Note The axis parameter data stored in addresses 0004 to 0099 can be transferred
from words (m+4) through (m+99) of the DM area, and data can also be trans-
ferred for the data transfer area at the Programmable Controller. Moreover, data
can be saved to the flash memory.
The explanations provided here use the C200HW-NC413 PCU as an example.
With the NC213 and NC113, the sizes of the various areas differ depending on
the number of axes. For details, refer to Section 4 Data Areas.
The PCU occupies 20 words of the Special I/O area within the Programmable
Controller's IR area. Of these, eight words are used during I/O refreshing for out-
putting information related to instructions for operations such as transferring
data from the Programmable Controller to the PCU. The remaining 12 words are
used for inputting the PCU's status during I/O refreshing.
The PCU occupies 100 words of the Special I/O Unit data area within the Pro-
grammable Controller's DM area. When the PCU is powered up or restarted,
common parameters and axis parameters related to control are transferred to
the PCU. The axis parameters are stored in the PCU's internal RAM by address.
It is also possible, when the PCU is powered up or restarted, to use axis parame-
ters previously stored in the PCU's internal flash memory, without having them
transferred from the Programmable Controller. The selection as to which of
these two methods to use is made by a common parameter setting. For details,
refer to 4-2 Common Parameter Area.
Note The common parameter area settings are required when the PCU is used. If
these settings are not made, a common parameter error (error codes 0010 to
0013) will be generated.
Depending on a common parameters setting, 34 words are reserved in the Pro-
grammable Controller's data areas. Of these, 26 words are used during I/O
refreshing for outputting information related to data transfers from the Program-
mable Controller to the PCU, and information used for operations. The remain-
ing eight words are used for inputting the PCU's status during I/O refreshing.
When data is transferred according to the data transfer information set in the
operating data area, only the portion of data transferred is used. When the data
transfer instructions, Intelligent I/O Write (IOWR) and Intelligent I/O Read
(IORD), are executed, the positioning data is transferred to the PCU.
Data in internal memory can be saved to flash memory by executing a data save
instruction from the Programmable Controller. The saved data is automatically
written to the internal memory when the PCU is powered up or restarted. How-
ever, whether axis parameters are read from the parameter area (DM) or from
flash memory is determined by a common parameters setting.
Section 1-5