Beckhoff EP3356-0022, Documentation

Page: 45 / 91

Commissioning/Configuration
EP3356-0022 45 Version: 1.4
Permanent tare
• The correction value is stored locally in the boxes EEPROM and is not lost in the event of a power
failure. To this end the command "0x0002" is executed on CoE object 0xFB00:01 [
}
64] (binary dialog
in the System Manager: "02 00"). This sets the tare object ( 0x8000:22 [
}
66] ) such that the display
value is 0.
Local storage
The values modified during the theoretical and practical calibration are stored in a local EEPROM.
This can be written to up to 1 million time. In order to prolong the life of the EEPROM, therefore, the
commands should not be executed cyclically.
Commands
The functions discussed above are carried out by means of commands in the standardized object 0xFB00
[
}
64] .
Index Name Comment
FB00:01 Request Entry of the command to be executed
FB00:02 Status Status of the command currently being executed
0: Command executed without error
255: Command is being executed
FB00:03 Response Optional response value of the command
The function blocks FB_EcCoESdoWrite and FB_EcCoESdoRead from the TcEtherCAT.lib (contained in the
standard TwinCAT installation) can be used in order to execute the commands from the PLC.
Commands of the EP3356
The following commands can be transferred to the box via the CoE entry 0xFB00:01 [
}
64] .
Command Comment
0x0101 Execute zero balance
0x0102 Execute calibration
0x0001 Execute tare procedure (value is NOT saved in the boxes EEprom)
0x0002 Execute tare procedure (value is saved in the boxes EEprom)