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When no signal is applied (open input), the pull-up resistor of 10 kOhm keeps the Schmitt-trigger input at
a logical 1. This corresponds to a non-active situation for the respective function. This is true for all
functions in the default situation (i.e. the way your BD 11E/12E was factory set and shipped) If the
function has to be activated, a logical 0 (zero) must be applied. This can be done by either short
circuiting the input to ground or by applying an active zero (TTL spec.).
5.4
Signal explanation
Figure 9 shows the connector lay out of the 15-pin sub D connector. Below a list is given with the
functions that are available when these options are installed.
Fig. 9
15-pin sub D connector lay out
1
-
penlift channel 1
2
-
penlift channel 2
3
-
start of plot/major gridmark
4
-
go to major gridmark
6
-
servomarker channel 1
7
-
servomarker channel 2
8
-
home
10
-
ground
12
-
chart on/off
14
-
external chartdrive pulse input
15
-
ground
x
=
0
=
+
=
When the POC (Pen Offset Compensation) option is installed, the following additional functions are
available:
5
-
POC on / off
13
-
serial out ch.1/2 (9600 Baud)
In order to suppress unwanted interference from external origin, all signal inputs, except ECP (External
Chartdrive Pulse) and servomarker, are being filtered. Any pulse that is shorter than 40 ms is rejected.
As a consequence these signals are always delayed for 40 ms.
5.4.1
External chartdrive control (BD 11E/12E)
When an External Chartdrive Pulse (ECP) is used for moving the paper under the pens, a so-called
divisor is applicable. This is a number between 1 and 12000, by which the number of received pulses is
divided, before one step (i.e. 0.05 mm) is made. The value of this divisor depends on the position of both
the two-state button "mm/min" or "mm/s" and the 8 position turning knob "chart speed". Switching from
"mm/s" to "mm/min" increases the divisor with a factor 60 and turning "chart speed" from 20 towards 0.1
22
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Instruction manual BD 11/11E / 12/12E
only available in record on mode
"0" active or contact closure
only available when internal penlift is not active
Kipp & Zonen B.V.
X
0
+
X
0
+
X
0
X
0
0
0
X
0
X
X
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