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6.4 Watlow MicroDIN
Operations
LED
Indication Symptoms Probable Cause(s)
Troubleshooting Alarms and Errors
most likely problems are listed first
Power
• No power. • Power supply switch off
• Fuse blown
Error = off • Breaker tripped
• Safety interlock door switch, etc.
• Separate system limit control may be latched
• Open wiring
(Normal = • Power ≤ 20V‡ (ac/dc)
steady green)
Communications
• Unit will not communicate. • MicroDIN address DIP switch incorrectly set
• MicroDIN baud rate DIP switch incorrectly set
Error = off • MicroDIN unit-to-unit daisy chain disconnected
• Reversed, short or open EIA-485 communications wiring
• EIA-485 converter box incorrectly wired
• Computer COM port incorrectly set up
(Normal = • Communications software setup or address incorrect
pulsing green) • Protocol or parity wrong, not 8, n, 1
• Needs termination and pull-up and pull-down resistors
Input Error
• Input is in error condition. • The sensor is improperly wired
• Sensor wiring reversed, shorted or open
Error = steady red • MicroDIN firmware setting does not = actual sensor
• Power ≤ 20V‡ (ac/dc)
• Ambient environmental temperature out of spec for MicroDIN
(Normal = off) • The MicroDIN open loop detect shows a broken sensor
• The calibration offset parameter is set much too high or low
Alarms
• Alarm won’t occur. • Alarm output off
Alarm = • Alarm set points incorrect
steady red • Alarm silenced
• Alarm sides incorrect
• In diagnostics mode
• Alarm won’t clear. • Alarm latched
• Alarm set points incorrect
• Alarm hysteresis incorrect
(Normal = off) • Input in error condition
Unit Errors
Flashing LED Error 4
•
RAM malfunction
Indicator Light Error 5
•
EEPROM data corrupted
Pattern Error 6
•
PROM malfunction
Error 7
•
Logic hardware problem
Error 11
•
New firmware installed
Error 12
•
Calibration data corrupted
Error 13
•
Analog-to-digital hardware failure
Error 14
•
EEPROM hardware problem
Error 15
•
New unit first power up
- MICRODIN 1
- User’s Manual 1
- Addendum 2
- Declaration of Conformity 3
- Meet the MicroDIN Team 4
- Safety Information 5
- Technical Assistance 5
- Your Feedback 5
- Table of Contents 6
- Chapter One: 7
- Setup Steps 9
- Indicator Lights 9
- Overview 10
- Chapter Two: 11
- Communications Setup 11
- Communications Overview 12
- EIA-485 Network 13
- Communication 14
- MicroDIN, A Modbus 15
- Remote Terminal Unit (RTU) 15
- Modbus Register Numbers 16
- Set Address/Baud Rate 17
- C D D C 18
- 8 None 1 1 19
- Chapter Three: 21
- Installation and Wiring 21
- Introduction 22
- Mounting the MicroDIN 23
- Figure 3.3 23
- Install and Wire 24
- To Mount MicroDIN 24
- To Dismount MicroDIN 24
- Input Wiring 26
- Output and Power Wiring 27
- Communications Wiring 28
- Wiring Examples 30
- Chapter Four: 33
- Features 33
- The System 34
- Power Limit 35
- Calibration Offset 36
- Filter Time Constant 37
- Sensor Selection 38
- Range Low and Range High 38
- Control Methods 39
- Proportional Control 40
- Alarm Set Points 43
- Alarm Hysteresis 43
- Process or Deviation Alarms 44
- Alarm Latching 44
- Alarm Silencing 45
- Panel Indicator Lights 46
- Open Loop Detect 46
- Bumpless Transfer 47
- Chapter Five 49
- Learn the Parameters 49
- System Group 50
- System Group continued 51
- Input Group 52
- Input Group continued 53
- Control Output Group 56
- Parameters 57
- Power Limit Set Point 57
- High Side Power 57
- Low Side Power 58
- Fixed Manual Output 58
- Operation Group 59
- Operation Group continued 60
- PID Group 61
- PID Group continued 62
- Alarm Output Group continued 66
- Error Group continued 70
- Characteristics Group 73
- Serial Number 2 74
- Software ID Number 74
- Software Revision 74
- Diagnostics Group continued 75
- Calibration Group continued 78
- Chapter Six: 81
- Operation and Calibration 81
- MicroDIN Startup 82
- MicroDIN Shutdown 83
- Operations 84
- • See p. 5.6 85
- Equipment Required 86
- Setup and calibration 86
- Appendix 87
- Writing a Modbus Application 88
- Packet Syntax 88
- Loop Back Command (0x08) 91
- Exception Responses 92
- Glossary 94
- Output #1: User selectable 99
- Output #2: User selectable 99
- A.14 Watlow MicroDIN 100
- Ordering Information 101
- 4.4, 5.6 102
- Watlow MicroDIN A.17 103
- Parameter Index 104
- Statement: 106
- Quality and 106
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