Yaskawa MotionWorks IEC Hardware - Manual (Page 49)

MotionWorks IEC Hardware Configuration – 2013-03-26 46
The Modbus memory map for an MPiec controller when configured as a
server (slave) is shown in the figure below. Note that by default, function
codes 01 and 03 return data that was sent to the controller from the
master and do not reflect data from the Global Variables in the IEC
application program.
If 'Add Holding Register Outputs' is enabled, the IEC application program
can write into MODBUS memory register 41025 from as shown in the
figure below
If the master requires a Device ID setting for the server, the MPiec
controllers have a device ID of "1".
Other Modbus Driver features:
•
The Modbus memory is copied to the Global Variables at the task
update rate as configured by the user in the Hardware Configuration.
• Maximum number of clients on the network: Tested 3 clients polling
an MPiec controller simultaneously.
• Modbus coil 1 equates to the Global Variable at %IX24560. 128
coils are available.
• Modbus register 40001 equates to the Global Variable
at %IW28672. 1024 registers are available.
• Modbus input 10001 equates to the Global Variable
at %QX24560. 128 inputs are available.
• Modbus register 30001 equates to the Global Variable
at %QW28672. 1024 registers are available.