Rice Lake SCT-20, Technical Manual

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Operation
© Rice Lake Weighing Systems ● All Rights Reserved 47
L = low half of the DOUBLE WORD forming the number
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.
REGISTER DESCRIPTION Saving to EEPROM ACCESS
40001 Firmware version — R
40002 Type of instrument — R
40003 Year of Production — R
40004 Serial Number — R
40005 Active program — R
40006 COMMAND REGISTER NO W
40007 STATUS REGISTER — R
40008 GROSS WEIGHT H — R
40009 GROSS WEIGHT L — R
40010 NET WEIGHT H — R
40011 NET WEIGHT L — R
40012 PEAK WEIGHT H — RR
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
Table 3-35. Usable Registers (Modbus-RTU)
IMPORTANT