5
Gateway InterBus-S
MG.10.G1.51 – VLT is a registered Danfoss trademark
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Parameterization
Parameterization via the Bus is only
possible if using PPO Type1.
Parameterization is effected via PCP
Communication. The procedure is as
follows:
Order to
Report from
IBS-master:
VLT
®
to master:
Write.Request
Confirmation
positive
Confirmation
negative, reporting
of error code
Read.Request
Confirmation
positive includes
the data of the
requested parame-
ter of the VLT
®
Confirmation
negative, reporting
of error code
Notes concerning programming:
The frequency converter can now be con-
trolled via the BUS; this is effected simply
through setting or reading of I/O-Bits.
Control word
As opposed to what is said in the product
manual about the PROFIBUS Option
Card, bit number 10 has to be set at "0"
to enable control. This will ensure that the
VLT
®
accepts the control word. The
Gateway automatically converts this bit to
a "1".
The control word for:
starting forward is
047F
047F
047F
047F
047F Hex or 0000 0010 0111 1111.
0000 0010 0111 1111.
0000 0010 0111 1111.
0000 0010 0111 1111.
0000 0010 0111 1111.
starting reverse is
847F
847F
847F
847F
847F Hex or 0100 0100 0111 1111.
0100 0100 0111 1111.
0100 0100 0111 1111.
0100 0100 0111 1111.
0100 0100 0111 1111.
stopping with normal ramp (Param. 208) is
044F
044F
044F
044F
044F Hex or 0000 0100 0100 1111,
0000 0100 0100 1111,
0000 0100 0100 1111,
0000 0100 0100 1111,
0000 0100 0100 1111,
stopping with alternative ramp (Param.
210) is 064F
064F
064F
064F
064F Hex or 0000 0110 0100
0000 0110 0100
0000 0110 0100
0000 0110 0100
0000 0110 0100
1111.
1111.
1111.
1111.
1111.
Reference/Actual values
The reference and the actual value of the
VLT
®
returned are handled in a norm-set
format. The setting range goes from
-10000 for -100.00% up to +10000 for
+100.00%. The 100.00% corresponds to
4000 hex. Negative reference are
generated through the two's complement.
Example:
Min.frequency = 0Hz;
Max.frequency = 50Hz
Desired is 25Hz corresponding to 50% of
the max. rpm:
50.00% = 2000 hex =
0010 0000 0000 0000Binary
For 25Hz with reversing = -50% of the
max. rpm:
50.00% = 2000 hex =
0010 0000 0000 0000Binary
reversal of a positive to a negative desired
value:
0010 0000 0000 0000 Binary
->
1101 1111 1111 1111 Binary One's complement
->
+ 1 Binary
=
1110 0000 0000 0000 Binary Two's complement
-50.00% = E000 hex = 1110 0000 0000 0000Binary
If you would like to know more about
control word, state-machine, reference
value, etc, please consult the product ma-
nual for the PROFIBUS Option Card.
Pr
operties of PROFIBUS-DP
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