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Communication in SIMATIC S7-300/1200/1500

11.7 I/O interface of function block

SIWAREX WP321

Manual, 07/2014, A5E33715669A-02

103

11.7

I/O interface of function block

The following scale parameters are available cyclically in the data block in the controller

without special reading of data records or can be sent to the scale without sending of data

records:

Table 11- 2 I/O data of the function block

Parameter (read)

Meaning

SCALE_STATUS_1 (UINT) Bytes 0 & 1 of the scale status (→ DR 30 current process

values (Page 74))

SCALE_STATUS_2 (UINT) Bytes 2 & 3 of the scale status (→ DR 30 current process

values (Page 74))

Process value 1 Selection → Selection of process value 1, 2 (Page 72)

Process value 2 Selection → Selection of process value 1, 2 (Page 72)

Parameter (write)

S7 tare specification Specified value for tare weight. The value is applied by

using the "Tare specification valid (1016)" command.

11.8

Error codes of function block

Table 11- 3 Statuses/errors when working with the function block

Error bit

Error description

bo_ApplIDError Address module does not match the function block

bo_ApplIDDRError Data record does not match the inserted module

bo_SFBError Runtime error during transmission of data record

bo_RdPerError Reading of I/O data failed

bo_LifeBitError SIWAREX no longer responds

bo_StartUpError Command was sent although StartUp is still TRUE

bo_WrongFW Data record version does not match the firmware

bo_InvalidCMD An invalid command code was sent

bo_DataOperationError Synchronous data operation error has occurred

bo_StartUp Startup synchronization of module running

Note

If execution of the function block is faulty, the variables shown do not correspond to the

actual status in the module.

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