Data Formats And Data Conversion - Siemens SIMOVERT FC Series Operating Instructions Manual

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4.9

Data formats and data conversion

Data format
Mitsubishi
converter
Data format
SIMOVERT
MASTERDRIVES
4-22
Mitsubishi converters handle data as unsigned 16 bit integer. The
direction of rotation is coded in control bits STF (RYn0) and STR
(RYn1). Depending on the process value (e.g. current, frequency) this
integer value gets a precision factor:
Process
value
Frequency
Current
Voltage
Torque
Rotation
Table 4-8 Mitsubishi data format; precision
SIMOVERT MASTERDRIVES works internally with process values in
16 bit or 32 bit signed integer (2nd-complement). These values are
normalized in percent:
Integer value
16 bit 32 bit
. .
. .
4000h 4000.0000h
. .
. .
0000h 0000.0000h
. .
. .
C000h C000.0000h
. .
. .
Table 4-9 SIMOVERT MASTERDRIVES internal data format
The display of SIMOVERT MASTERDRIVES shows the absolute value.
For this reason there are parameters with scaling factors (e.g.
P350...P353). Their contents are the absolute value at + 100 %.
CBL has to convert the data from Mitsubishi data format in
MASTERDRIVES data format and vice versa. The CBL uses
parameters (P715...P718) pointing to the scaling parameters
(P350...P353). Other scaling factors may be parameterized. Normally
the user sets P715 = 350, P716 = 351, etc. In this way CBL use the
same scaling factors like display routines of the converter. CBL
automatically adapts the precision between Mitsubishi data format and
MASTERDRIVES display format. It uses the parameter description
(conversion index in IEEE format) of the scaling factor parameters.
Precision integer
(1 digit)
0.01 Hz
0.01 A
0.1 V
0.1 %
1 Rotation/minute
Real value
.
.
+ 100 %
.
.
0 %
.
.
– 100 %
.
.
6SE7087-6NX84-0GB0
Operating Instructions
03.99
Siemens AG
SIMOVERT MASTERDRIVES