88192277-01-19 - Micron Technical Reference V9 Volume 4.pdf - 第122页

DIAGNOSTI CS PASS THROUGH RAILS 39.36 Technical Reference Manual Chapter Issue 4, Aug 14

DIAGNOSTICS

PASS THROUGH RAILS

Chapter Issue 4, Aug 14 Technical Reference Manual 39.35

Cycle Count This diagnostic function displays the amount of cycles done and the amount of

cycles to go to complete the cycle count. The cycle count may be preset 5 -

9995 cycles (default 50) by selecting Adjust.

DIAGNOSTICS

PASS THROUGH RAILS

39.36 Technical Reference Manual Chapter Issue 4, Aug 14

SENSORS

INTRODUCTION

Chapter Issue 6, May 19 Technical Reference Manual 40.1

CHAPTER 40 SENSORS

INTRODUCTION This chapter gives details of the various sensors used in the printer. All sensors

used on the printer fall within three categories, these are:

• Solid State Switch Sensors

• Conventional Switch Sensors

• Analogue Sensors

Solid State

Switches

The printer uses the following types of solid state sensor switches:

• Hall Effect Sensors

• Opto Sensors

• Ultrasonic Sensor

• Capacitive Proximity Sensor

In all cases to initiate a logic 1 (on state) at the input, the sensor must connect

the signal input to 0V. This may not, however, translate to a positive condition

after software processing.

Figure 40-1 Typical Solid State Schematic

Testing Solid state sensors can only be tested in circuit as they require a logic supply

voltage and a pull up resistor on the sensor output.

1. Check for the 12V logic supply to the sensor.

2. Activate the sensor according to type and measure the voltage at the output

terminal with respect to 0V. The sensor output signal should change

between approximately 0V and 12V (see individual sensor descriptions for

more details).

Digital Input

12V

Opto-isolator

1K8

Signal I/P

Control

Circuit

Solid State

Sensor