Siemens SIMATIC TI505 Betriebsanweisung PDF herunterladen (Seite 8)

Simatic/TI 505 Ethernet Driver Help

Bit Order for V, K, WX, WY and STW

This option is used to select the order in which bits will be presented to V, K, WX, WY and STW memory types

when bit-accessed.

Bit Order for Loops/Alarms

This option is used to select the order in which bits will be presented to Loop and Alarm memory types that are

bit-accessible and are being bit-accessed (such as LCF).

MSB=Most Significant Bit

LSB=Least Significant Bit

Note: For the following example, the 1st through 16th bit signifies either 0-15 bits or 1-16 bits depending on if

the driver is set at 0-Based bit addressing or 1-Based.

DWord follows the same bit order logic as Words except that there are 32 bits instead of 16.

Bit 0 Is MSB of Word

MSB LSB

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Bit 1 Is LSB of Word

This is the default setting.

MSB LSB

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Note for CTI 2572/2572-A and CP2572: Bit 0/1 Is MSB corresponds to the TICVU I/O server and is not the

default setting with this OPC server. Select this option if applicable. Bit 0/1 Is LSB corresponds to the TI Direct

I/O server (TIDIR). Select this option to make the OPC server compatible with the TIDIR I/O server. For instance,

the TIDIR I/O server should be used as a backup in certain applications.

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Siemens SIMATIC TI505 Betriebsanweisung Seite 8