Watson-Marlow MM420 - Manual (Page 123)

Issue 10/06 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 123
Binary-coded selection + ON command
Using this technique up to 8 fixed frequencies can be selected using 3 control
signals. These control signals are either entered via digital inputs or a serial
communications interface. The fixed frequencies are indirectly selected using the
binary coding (refer to Table 3-22,
→ e.g. selected using the digital DIN inputs),
whereby the selection is combined with the ON command.
Table 3-22 Example for binary coding via digital inputs
DIN3 DIN2 DIN1
0 Hz FF0 0 0 0
P1001 FF1 0 0 1
P1002 FF2 0 1 0
… … … … …
… … … … …
P1006 FF6 1 1 0
P1007 FF7 1 1 1
Contrary to "Direct selection + ON command", the ON command is only active if
the setting for the first 3 binary inputs is set to "Binary-coded selection + ON
command" or P0701 = P0702 = P0703 = 17. The following is obtained analog to
the above example:
a) Standard method
→ P0701 = 17
b) BICO method → P0701 = 99, P1020 = 722.0, P1016 = 3
P1016
P0701 = 17 or P0701 = 99, P1020 = 722.0, P1016 = 3
DIN1 r0722.0
P1020
1
2,3
0
P0702 = 17 or P0702 = 99, P1021 = 722.1, P1017 = 3
P1017
DIN2 r0722.1
P1021
1
2,3
0
. . . .
0 0 1
1 1 1
Fixed frequency 7
-650.00 ... 650.00 [Hz]
P1007.D (30.00)
r1024
CO: Act. FF
Fixed frequency 1
-650.00 ... 650.00 [Hz]
P1001.D (0.00) .
.
.
.
.
.
...
Fig. 3-43 Example for selecting FF1 via DIN1 and FF2 via DIN2 using the binary-coded
method