Ladder Program Example - Omron CS1W-MC221 - 02-2008 Operation Manual

Motion control units

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Transfer Data

Ladder Program Example

X-axis Busy Flag Y-axis Busy Flag

!Caution Do not attempt to save data to flash memory during program execution or

Set the following data starting at the word specified for the source start word

address (S) and execute the IOWR instruction.

Set X =to 1 (S + 1: 0000, S: 0001) when saving (writing) position data and

system parameters to flash memory. S is the source start word address (S)

set in the IOWR instruction.

Refer to the following examples of actual data transfer using an MC Unit with

the unit number 0 mounted in a CS. In these examples, the IOWR operand

and transfer data are both assumed to be correct.

When debugging, write ladder code that will check the Error Flag and bit 14 of

word n + 10/n + 18.

Saving Position Data to Flash Memory

Execution condition

Settings in DM Area

When task 1 is not being executed in memory (Execution Flag OFF) and none

of the axes is moving (Busy Flags OFF), then the data will be saved to flash

while a motor is operating. Doing so can result in unexpected operation.

Note It normally requires from one to two seconds to save data to flash memory,

but a maximum of 30 seconds can sometimes be required.

Set the data

required for transfer.

Address (6100) for saving position data to

flash memory. (17D4 Hex (6100)).

Set the address of the first source word of

the position data.

Set the source unit number to 0 and a

total of 2 words to be transferred.

OUT (Work bit)

Save to flash memory.

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