Sensoray 626 Bedienungsanleitung PDF herunterladen (Seite 12)

Sensoray Model 626 Instruction Manual

9.2 Writing to the Digital Outputs

There are 3 digital output registers used to write to the outputs. The format of the data to be written to

each register is shown below.

Table 5 Writing to Digital Outputs

Offset Output Channel Number

(Hex)

Name

Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

48 DOUTA 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

58 DOUTB 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

68 DOUTC 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

Writing a “0” to a bit in the output register will cause the corresponding output to turn off and thus give

an output of 5V. When a ‘1’ is written then the output transistor is turned on causing the output channel

to give an output of 0V.

When an I/O channel is to be used as an input then a ‘0’ must be written to the corresponding bit of that

channels output register. This is to prevent high currents caused if the output transistor is turned on

while a 5V input signal is being applied to the input.

9.2.1 Digital Outputs 0-5 used as Counter Overflows

Digital outputs 0-5 can be setup to pull the corresponding output load low for a short pulse (500nsec)

when the counters overflow.

9.3 Reading the Digital Inputs

There are three digital input registers used to read the inputs. The format of the data returned by each

Table 6 Reading Digital Inputs

Offset Input Channel Number

(Hex)

Name

Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

40 DINA 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

50 DINB 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

60 DINC 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

Each digital input has a 10K Ohm pull-up resistor to +5V. With a 5V input or no input connected a ‘0’

will be read from the digital input register. Pulling the input to ground will cause a ‘1’ to be read from

the digital input register. The corresponding output register must have “0” written to it before it can be

used as an input.

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Sensoray 626 Bedienungsanleitung Seite 12