SCT-20 Series
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3.6 SCT-20 DeviceNet
The SCT20-DN works as a source in a DeviceNet network.
Load the included EDS file (DeviceNet_20.eds) in the DeviceNet primary’s development instrument.
The data exchanged by SCT20-DN are:
Possible Command To Send To The Command Register
To execute the same command twice consecutively, send command 0 between the first command and the following
one.
Gross Weight, Net Weight:
The weight values are expressed as positive integer numbers, including decimal figures but without decimal point.
Read the Status Register to obtain information about sign and possible errors on the weight.
Setpoints:
The Setpoints are weight values expressed as positive integer numbers, including decimal figures but without decimal point.
• READING – send to the Command Register the reading command of the required setpoint (e.g. 90 for reading setpoint
1) and read the content of the Setpoint register.
• WRITING – write the weight value to be set in the Setpoint and send to the Command Register, the writing command of
the required setpoint (e.g. 93 for writing setpoint 1).
Setpoints are stored to the RAM volatile memory and lost upon instrument power off. To save them permanently in
the EEPROM memory, so that they are maintained upon the instrument power on, it is necessary to send the
command 99 (Save data in EEPROM) of the Command Register.
Outgoing Data from SCT-20 DeviceNet (Read)
Addresses
Gross Weight [4 bytes]
0x0000-0x0003
Net Weight [4bytes]
0x0004-0x0007
Setpoint [4 bytes]
0x0008-0x000B
Status Register [2 bytes]
0x000C-0x000D
Digital Inputs Status [1 byte]
0x000E
Digital Outputs Status [1 byte]
0x000F
Input Data to SCT-20 DeviceNet (Write)
Addresses
Command Register [2 bytes]
0x0000-0x0001
Digital Outputs Command [2 bytes]
0x0002-0x0003
Setpoint [4 bytes]
0x0004-0x0007
Table 3-4. Exchanged Data SCT-20 DeviceNet
Code
Description
Code
Description
0 No command
90 Read setpoint 1
7 Semi-automatic tare (NET display)
91 Read setpoint 2
8 SEMI-AUTOMATIC ZERO
92 Read setpoint 3
9 GROSS display
93 Write setpoint 1
21 Keypad lock
94 Write setpoint 2
22 Keypad and display unlock
95 Write setpoint 3
23 Keypad and display lock
99 Save data in EEPROM
9999 Reset (reserved)
Table 3-5. Commands to Command Register (DeviceNet)
Note
Note
