Rice Lake SCT20-AN, Technical Manual

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IMPORTANT
SCT Weight Transmitter – 20 Series Technical Manual
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At the time of writing, the setpoints, hysteresis values are saved to the RAM and will be lost upon the next
power-off; to store them permanently to the EEPROM so that they are maintained at power-on, the ‘99’ command
of the Command Register must be sent.
Weight (Span) Calibration Commands (With Test Weights)
The SCT20-MB calibration can be changed via Modbus. To perform this procedure, the system must be unloaded and the
weight value display reset to zero with the command 100 of the Command Register. A load must then be placed on the system
and the correct weight value must be sent to the registers 40037-40038. To save this value, send the control 101 from the
Command Register. If the operation is completed successfully, the two test weight registers are set to zero.
Analog Output Setting (Analog Models Only)
Write the weight in the registers 40045 (Weight value corresponding to the Full Scale of analog output H) and 40046 (Weight
value corresponding to the Full Scale of analog output L), or write the weight in the registers 40043 (Weight value
corresponding to the ZERO of the analog output H) and 40044 (Weight value corresponding to the ZERO of the analog output
L). After writing the value, send the command 99 from the Command Register to save it to EEPROM memory.
40013 PEAK WEIGHT L — R
40014 Divisions and Units of measure ) — R
40015 Coefficient H — R
40016 Coefficient L — R
40017 Setpoint 1 H Only after command ‘9’’ of the
COMMAND REGISTER
R/W
40018 Setpoint 1 L R/W
40019 Setpoint 2 H R/W
40020 Setpoint 2 L R/W
40021 Setpoint 3 H R/W
40022 Setpoint 3 L R/W
40023 Hysteresis 1 H R/W
40024 Hysteresis 1 L R/W
40025 Hysteresis 2 H R/W —
40026 Hysteresis 2 L R/W —
40027 Hysteresis 3 H R/W —
40028 Hysteresis 3 L R/W —
40029 Inputs — R
40030 OutputS NO R/W
40037 Test weight for calibration H Use with command ‘101’ of the
COMMAND REGISTER
R/W
40038 Test weight for calibration L R/W
40043 Weight value corresponding to ZERO of
the analog output H
Ony after command ‘99’ of the Command
Register. (Analog Models Only)
R/W
40044 Weight value corresponding to ZERO of
the analog output L
R/W
40045 Weight value corresponding to Full Scale
of the analog output H
R/W
40046 Weight value corresponding to Full Scale
of the analog output L
R/W
REGISTER DESCRIPTION Saving to EEPROM ACCESS
Table 3-33. Usable Registers (Modbus-RTU) (Continued)