User guide

eWON 500-2001-4001-4002 User Guide - IO Servers Configuration

eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 103

• Bit access modifier:

In any of the items above, it is possible to access a single bit.

#x must be appended to the Tag name (Bit index goes from 0..31).

The syntax can be used for reading bits and for writing them as well.

Example:

DB1W13#3 represents bit 3 of W13 in DB 1

REM:

Bit index range depends on item referenced (for W, bit index maximum value is 15)

NOTES:

• For DB the smallest element is a WORD and we count addresses in Word.

This means that DB1W0 and DB1W1 WILL NOT

overlap.

• Timers and Counters are always Words and addresses are counted in WORD also.

This means that T0 and T1 WILL NOT

overlap.

• For M, I, Q addresses are counted in BYTES.

This means that M0W and M1W WILL

overlap.

• Both syntax (German and English) can be used for I, Q, C

which in German gives: E, A, Z.

• Status register:

The STATUS Tag is a special Tag that returns information about the current state of the communication for a given device.

As for other Tags, the status Tag ValueName is composed of:

Status,ComPortNum

• You can define a status Tag for each COM port used.

• If you use the status address, the Tag must be configured as analog.

6.8.4.2 Tag value Meaning:

Communication not initialized. Status UNKNOWN.

If no Tag is polled on that device address, the communication status is unknown.

1 Communication OK.

2 Communication NOT OK.

Table 75: Tag value meaning