Siemens SIWAREX WP251 User Manual

SIWAREX WP251
Manual, 12/2015, A5E37203357A
185
Communication with SIMATIC S7-1200
11
11.1
Integration in SIMATIC S7-1200
11.1.1
General information
A SIWAREX WP251 occupies 32 bytes each in the input and output I/O areas of the CPU.
The maximum number of SIWAREX WP251 weighing modules is defined as follows:
● S7-1212 CPU → Up to a maximum of two WP251 weighing modules
● S7-1214 CPU → Up to a maximum of eight WP251 weighing modules
● S7-1215 CPU → Up to a maximum of eight WP251 weighing modules
● S7-1217 CPU → Up to a maximum of eight WP251 weighing modules
Additionally read the memory requirement for the function block call.
Note
The direct use of SIWAREX WP251 with fail
-safe SIMATIC S7-1200 controllers is not yet
supported.
Table 11- 1 Memory requirements of the function block
FB with DS communication
(FB251 "WP251PR")
Read weight and status
YES
Send commands
YES
Send parameters
YES
Main memory requirements in CPU
15 600 bytes + n x 2 650 bytes
Load memory requirements in CPU
232 000 bytes + n x 62 000 bytes
n = number of WP251 modules
The function block described above including HMI configuring can be downloaded as a
ready-made example project (https://support.industry.siemens.com/cs/ww/de/ps/17796
)
("Ready-for-use") from the Siemens Industry Online Support.
The latest firmware version for the weighing modules can be downloaded at: Firmware
update (https://support.industry.siemens.com/cs/ww/de/ps/17796
)

Siemens SIWAREX WP251 Specifications

General

Brand	Siemens
Model	SIWAREX WP251
Category	Accessories
Language	English