Device Point Properties

On the Device tab in the Point Properties dialog box:


For all memory types except %L, enter the memory type and offset in the Address field. The address format is:

<memory type><address>

For example, to specify Register 1, the address is %R1. All offsets have a minimum value of 1.


The address of %L memory types requires the block name. Block names must be unique over all programs in the programmable controller. Block names cannot begin with a numeric character. The address format is:

%L<address><block name>

For example, to specify the fifth word in the %L domain in the program block ABC, the address is %L5ABC.

Update Criteria

The update criteria determine how the data will be requested.

Select On Change or On Scan for points whose value should be polled by Series 90 TCP/IP communications at regular intervals.

Select On Demand On Change or On Demand On Scan for points whose values should be polled by Series 90 TCP/IP communications at regular intervals when users are viewing them.

Select Unsolicited for points that are updated by unsolicited messages from devices. Note that for redundant devices the communications enabler will accept unsolicited data from any PLC.

Point Type

Select one of the following:

For device points, select Normal.

For diagnostic points, select Diagnostic. The Series 90 TCP/IP Communications enabler uses standard diagnostic points.

When you are configuring Boolean points in memory types that are not bit addressable, you must also enter data in the following field:

Address Offset

Enter the bit offset that corresponds to the bit position within the word.