Communication In Simatic S7-300/1200/1500; General Information; Structure Of The Program "Ready For Use; Table 11- 1 Memory Requirements Of The Function Block - Siemens SIWAREX WP321 Manual

Communication in SIMATIC S7-300/1200/1500

11.1

General information

A SIWAREX WP321 occupies 16 bytes each in the I/O areas of the CPU. Communication
between SIWAREX and SIMATIC CPU is supported by the FB.
Table 11- 1
Read weight and status
Send commands
Send parameters
Main memory requirements in CPU
Load memory requirements in CPU
n = number of WP321 modules
The function block described above including HMI configuring can be downloaded as a
predefined example project ("Ready-for-use") from the Siemens Customer Support.
11.2

Structure of the program "Ready for use"

There is one program for Step 7 Classic and another for TIA Portal. The two programs each
consist of two parts:
● STEP 7 software for the SIMATIC CPU
● WinCC project (integrated in SIMATIC Manager)
All messages are saved as bit information. The message system can thus directly access
the bit fields and display the message texts.
SIWAREX WP321
Manual, 07/2014, A5E33715669A-02
Memory requirements of the function block
FB 1, WP321DR
YES
YES
YES
11 600 byte + n x 1 232 byte
138 788 byte + n x 28 470 byte
11
95