Topic: DMD0063
DEVWRITE - Write Device Register
The Write Device Register (DEVWRITE) instruction is used to write a configuration value to a register in a Device. The individual registers that can be written to, and the values that can be written are defined by the Device.
The red triangle in the upper left corner indicates this is a Fully Asynchronous instruction.
Parameters:
Note: Use the F9 key (Element Browser) or Down-Arrow key (Auto-Complete) at any time to see a complete list of the memory locations that are valid in the current field of the instruction.
Device - designates which of the pre-configured devices to create the Device Struct for.
No devices
available - indicates there is no device that is appropriate for
this instruction. Select one of the following to create the required device:
create device - select this option to invoke the Device Configuration dialog of the System Configuration to create a new device of the appropriate type
create module - select this option to invoke the Module Configuration dialog of the System Configuration to create a new module configuration that can provide a device of the appropriate type
Write Register - designates
which register in the Device to write to
If the Device is the Onboard Serial port or a port on a SERIO module, the following values are valid:
Serial Control - valid Values are shown below
Modbus/RTU Master Inner-packet Delay (uSec)
Value - the value to write to
the register in the Device. This can be any constant value or any readable
numeric location
If the Write Register is Serial Control, the following are valid Values:
0x00 - lower the RTS line of the serial port
0x01 - assert the RTS line of the serial port
if the Write Register is Modbus/RTU Master Inter-packet Delay (uSec), the Values are valid:
0 to 65535
See Also:
DEVWRITE - Write Device Register
Related Topics:
For more information on Devices, Device References, and how to configure them go to the Device Configuration Section under System Configuration.
Rung Example:
