Emerson Process Management 2400S 8.10.6IrDA port usage, 8.10.7Digital communications fault action

Optional Configuration

The primary reason to disable Modbus ASCII support is to allow a wider range of Modbus addresses for the service port.

To enable or disable Modbus ASCII support:

•Using ProLink II, see Figure B-2.

•Using the display menus, see Figure B-6.

8.10.6IrDA port usage

The IrDA port on the display can be enabled or disabled. If enabled, it can be set for read-only or read/write access.

To enable or disable the IrDA port:

•Using ProLink II, see Figure B-2.

•Using the display menus, see Figure B-6.

•Using a DeviceNet tool, see Table C-9.

To configure the IrDA port for read-only or read-write access:

•Using ProLink II, see Figure B-2.

•Using the display menus, see Figure B-6.

•Using a DeviceNet tool, see Table C-9.

8.10.7Digital communications fault action

Digital communications fault action controls how digital communications will be affected by fault conditions. Table 8-12lists the options for digital communications fault action.

Note: Digital communications fault action does not affect the alarm status bits. For example, if digital communications fault action is set to None, the alarm status bits will still be set if an alarm occurs. See Section 7.6 for more information.

Table 8-12Digital communications fault action options

	Option
ProLink II label	DeviceNet label	DeviceNet code	Definition
Upscale	Upscale	0	Process variables indicate the value is greater than
			the upper sensor limit. Totalizers stop counting.
Downscale	Downscale	1	Process variables indicate the value is less than the
			lower sensor limit. Totalizers stop counting.
Zero	Zero	2	Flow rates go to the value that represents zero flow.
			Density and temperature go to zero. Totalizers stop
			counting.
Not-A-Number	NAN	3	Process variables report IEEE NAN. Totalizers stop
(NAN)			counting.
Flow to Zero	Flow goes to zero	4	Flow rates go to the value that represents zero flow;
			other process variables are not affected. Totalizers
			stop counting.
None (default)	None	5	Process variables reported as measured.

Using a DeviceNet Tool

Required Configuration

Using the Transmitter

Optional Configuration

Configuration and Use Manual 73