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Ds 4 Limit Value Parameters; Ds 4 - Switch On Weight, Limit Value 1 - Siemens SIWAREX MS Device Manual

Weigh module for simatic s7-200.
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5.3 DS 4 Limit Value Parameters

In DS4, the switch on and switch off values for the limit values are parameterized.
Procedures:
Check all parameters and change if necessary.
o
Send DS 4 to the scale
o
Name
Switch on value
Limit value 1
Switch off value
Limit value 1
Switch on value
Limit value 2
Switch off value
Limit value 2
Limit value parameter
flag
Reserve 1
Table 5-2
Allocation of DS 4
5.3.1
DS 4 – Switch On Weight, Limit Value 1
Switch on and switch off weights can be defined separately for each limit value. In
this way, a minimum value monitor and a maximum value monitor can be realized
by hysteresis.
A maximum value monitor is realized with the following specification:
Switch on value > Switch off value
A minimum value monitor is realized with the following specification:
Switch on value < Switch off value
The figure below illustrates the function of limit values 1 and 2.
5-28
SIWAREX MS
Type
Length
Default
SHORT
2
400
SHORT
2
220
SHORT
2
1000
SHORT
2
980
UBYTE
1
0
UBYTE
1
0
10
Range of Values / Meaning
Switch on point, limit value 1
Switch off point, limit value 1
Switch on point, limit value 2
Switch off point, limit value 2
Bit 0 GW1 gross/net reference for GW1
0 = limit value 1 works on gross weight
1 = limit value 1 works on net weight
Bit1 GW2 gross/net reference for GW2:
0 = limit value 2 works on gross weight
1 = limit value 2 works on net weight
Bit 2 to 7 not used
Reserve 1

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