Yaskawa MotionWorks IEC Hardware User Manual

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MotionWorks IEC Hardware Configuration – 2013-03-26

Any IEC data type can be transmitted or requested from the remote device,
provided the data is interpreted as the same type on the other side.

To determine the memory area allocated for the Modbus connection, look
in the MotionWorks IEC’s IO_Configuration window in the Hardware
section of the Project Tree Window.

Note:

Care should be taken to understand and set the timeout period on

the server (slave) driver code. The recommended time out period for
server driver code is TO > update interval * # of data blocks.

One data block is polled per update interval set in the client (master). For
example if the client has four data blocks configured for a particular server
with a 50 ms poll period (update interval), the first data block is polled
first. After 50 ms the second data block is polled. 50 ms after the second
data block, the third data block is polled and so on. The first data block is
polled a second time 200 ms after it was polled the previous time as
shown in the figure below