Beckhoff EP3356-0022 Documentation page 83

• The correction value is NOT stored in the terminal/box and is lost in the event of a power failure. To
this end the command "0x0001" is executed on CoE object 0xFB00:01 [} 102] (binary dialog in the
System Manager: "01 00"). This sets the tare object (0x8000:22 [} 104]) such that the display value is
0. Note: in the case of a device restart (INIT → OP) the tare is not deleted. In addition this tare can be
executed via the control word:
Permanent tare
• The correction value is stored locally in the terminal's/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 [} 102] (binary
dialog in the System Manager: "02 00"). This sets the tare object (0x8000:22 [} 104]) 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
[} 102].
Index Name
FB00:01 Request
FB00:02 Status
FB00:03 Response
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 EL/EP3356
The following commands can be transferred to the terminal/box via the CoE entry 0xFB00:01 [} 102].
Command
0x0101
0x0102
0x0001
0x0002
EP3356-0022
Comment
Entry of the command to be executed
Status of the command currently being executed
0: Command executed without error
255: Command is being executed
Optional response value of the command
Comment
Execute zero balance
Execute calibration
Execute tare procedure (value is NOT saved in the terminal's/boxes EEprom)
Execute tare procedure (value is saved in the terminal's/boxes EEprom)
Version: 1.1.0
Commissioning/Configuration
83