Series HMI Connection Manual

b. Contacts

 

Format

 

 

Type

Word No.(n)

Read/Write Range

Note

Bank No.(m)

 

 

 

 

Bit No.(b)

 

 

Input Image

In.b

I0.0 - I65535.7

 

Output Image

Qn.b

Q0.0 - Q65535.7

 

Internal Bits

Mn.b

M0.0 - M65535.7

 

Data Area

DBm.DBXn.b

DB1.DBX0.0 – DB255.DBX65535.7

 

Data Area (DB10)

DBXn.b

DBX0.0 – DBX65535.7

 

Vn.b

V0.0 – V65535.7

 

 

 

NOTE

1)PLC needs to enable DB memory (DBm.DBWnDBm.DBDnDBm.DBXn.b) before DB data can be read.

2)Timer reads only up to 3 digits. If a value input is more than 3 digits, the Timer will

regards the highest 3 (decimal) and replace the rest by 0. For example, a value 12345 will be written as 12300 in PLC.

3)Counter reads only up to 3 digits. If a value input is more than 3 digits, the Counter will regards the first 3 digits and leave out the rest. For example, a value 12345 will be written as 123 in PLC.

4)Except register Tn and Cndata type of register is Byte and its order is opposite to usual controller , for example :

1IW3 is a word which combined from IB3 and IB4High Byte of IW3 is IB3Low Byte of IW3 is IB4.

2ID3 is Double Word which combined from IB3, IB4, IB5 and IB6, and its order from highest to lowest is IB3, IB4, IB5 andIB6.

And please be attentive to use these registers, because their Data type is different with Data Length, it will need more than one register for each access, for example:

1AIW6 which Data Type is Byte and Data Length is 1 Word, when it used for one word Numeric Entry , it will occupy two addresses AIB6 and AIB7

204

V1.02 Revision January, 2012

Page 2
Image 2
Fujitsu Siemens Computers Siemens S7 300 manual 204