Operating instructions

Loading mechanism of the weighing cell
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3.3 Controlling the loading mechanism using MT-SICS commands
The “WS” MT-SICS command can be used to directly control each position of the weighing sample holder. Note: For standard MX/UMX
balances the “WS” command is used to control the glass draft shield (see “MT-SICS for AX/MX/UMX balances 11780417” reference
manual). For MX5/UMX2 automated balances the parameters of the command have a different function:
Command Response (confirmation of
command execution)
Weighing sample moving to the following position
WS/1 WS/A Loading position
WS/0 WS/A Zero position
WS/2 WS/A Weighing position
The “WS” command (without parameters) can be used to request the current position of the weighing sample.
The response is “WS/A/x” where “x” represents one of the following values:
0 Zero position
1 Loading position
2 Weighing position
8 Error
9 Intermediate position
Important: Acknowledgment of the current position of the weighing sample is specified by the coding disk in the
balance. On each run command, the disk rotates to a specific position. If, however, the weighing sample holder
is blocked (e.g. by residue in the weighing chamber), the coding disk still rotates to the corresponding position
on a run command, but the weighing sample holder itself does not move and acknowledgment of the current
position is therefore incorrect. The user is therefore responsible for checking the plausibility of the weight in the
relevant position. Preferably, this is carried out by means of appropriate routines in the relevant control program.
In addition, it is recommended that the balance is checked and maintained regularly by an authorized service
engineer.
Please observe the instructions for the MT-SICS commands in the operating instructions for AX and MX/UMX balances. The “WS”
command can be used directly on the host computer via a terminal program or integrated in custom applications and used to automate
weighing.
Below is an example for an application in which the “WS” command is used to control the loading mechanism (for instructions for other
MT-SICS commands used and additional information about the “WS” command, please refer to the “MT-SICS for AX/MX/UMX balances
11780417” reference manual). In this example, the user is guided through the weighing process and can only press the keys on the
terminal that are required for the relevant step (the other keys are blocked).