Siemens SIWAREX FTC, Device Manual

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Name
Length
Type Range of Values / Meaning Reference
bytes
Filtered raw value DINT 4 Filtered digit value
Net_Process REAL 4 Net weight
Belt load REAL 4 Current belt load WU/m
Pulse counter value DINT 4 Pulse counter value with reference to the
measurement time
Flowrate 1 REAL 4 Flowrate [Weight/Time unit]
Belt speed m/sec REAL 4 Belt speed
Digital input states BYTE 1 Status of the DE
Reserved BYTE 1 Reserved
Current actuation signal
from controller in % *100
INT 2 Current actuation signal from controller in % *100
Setpoint value
REAL 4 Setpoint value
Effective setpoint
REAL 4 Effective setpoint
Actuation signal according
to material characteristic
curve
REAL 4 Actuation signal according to material
characteristic curve
Actuation signal according
to device characteristic
curve
INT 2 Actuation signal according to device characteristic
curve
Reserved INT 2 Reserved
64
Table 5-26 Combination of recording elements
The evaluation of the collected data can be handled using SIWATOOL FTC and
MS Excel. All of the logged elements that have been recorded are stored in the
Excel table and can be read in a graph over time.
The progress of the weighing procedure can be analyzed and optimized.
In the event of sporadic events in the system, the recording can be activated as
circulating memory and can be ended with a condition in the SIMATIC control
program at any time. The subsequent evaluation can help to explain a sporadic
event in the system. A simultaneous evaluation of the message buffer, in which the
last 100 events are stored (evaluation with SIWATOOL FTC) offers a good basis
for an analysis or remote analysis.
An element requires 46 bytes. If the recording is run e.g. once per 50 msec, it
means memory requirements of 920 bytes per second.
In the simplest case, the RAM memory (approx. 2 MB) of the SIWAREX FTC can
be used for the recording.
5.26 DR 123 Data Content MMC
By reading the DR 122, SIWATOOL FTC can be used to determine which data is
stored on the Micro Memory Card. Based on this information, the user can read
targeted records and logs.
5-86 SIWAREX FTC