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Lake Shore Model 642 Electromagnet Power Supply User’s Manual
5-34 Computer Interface Operation
LIMIT Limit Output Settings Command
Input: LIMIT <current>, <rate> [term]
Format: +nn.nnnn, +nn.nnnn
<current> Specifies the maximum output current setting allowed: 0 – 70.1000 A.
<rate> Specifies the maximum output current ramp rate setting allowed: 0.0001 – 99.999 A/s.
Remarks: Sets the upper setting limits for output current, compliance voltage, and output current ramp rate. This
is a software limit that will limit the settings to these maximum values.
LIMIT? Limit Output Settings Query
Input: LIMIT? [term]
Returned: <current>, <rate> [term]
Format: +nn.nnnn, +nn.nnnn (Refer to command for description)
LOCK Keypad Lock Command
Input: LOCK <state>, <code>[term]
Format: n,nnn
<state> 0 = Unlock, 1 = Lock All, 2 = Lock Limits.
<code> Specifies lock-out code. Valid entries are 000
– 999.
Remarks: Locks out all front panel entries operations.
Example: LOCK 1,123[term] – Enables keypad lock and sets the code to 123.
LOCK? Keypad Lock Query
Input: LOCK?[term]
Returned: <state>, <code>[term]
Format: n,nnn (Refer to command for description)
MAGWTR Magnet Water Mode Command
Input: MAGWTR <mode>[term]
Format: n
<mode> 0 = Manual Off, 1 = Manual On, 2 = Auto, 3 = Disabled.
Example: MAGWTR 2[term] – Places the magnet water mode to Auto, which will automatically control the
magnet water valve based on the calculated output power.
MAGWTR? Magnet Water Mode Query
Input: MAGWTR?[term]
Returned: <mode>[term]
Format: n (Refer to command for description)
MODE IEEE Interface Mode Command
Input: MODE <mode>[term]
Format: n
<mode> 0 = Local, 1 = Remote, 2 = Remote with local lockout.
Example: MODE 2[term] – Places the Model 642 into remote mode with local lockout.
MODE? IEEE Interface Mode Query
Input: MODE?[term]
Returned: <mode>[term]
Format: n (Refer to command for description)
- Model 642 1
- TABLE OF CONTENTS 5
- LIST OF ILLUSTRATIONS 9
- LIST OF TABLES 10
- CHAPTER 1 11
- INTRODUCTION 11
- 1-2 Introduction 12
- Introduction 1-3 13
- Description (Continued) 13
- 1.2 SPECIFICATIONS 13
- 1-4 Introduction 14
- Specifications (Continued) 14
- Introduction 1-5 15
- 1-6 Introduction 16
- Introduction 1-7 17
- 1.3 SAFETY SUMMARY 17
- 1-8 Introduction 18
- Safety Summary (Continued) 18
- Introduction 1-9 19
- 1.4 SAFETY SYMBOLS 19
- 1-10 Introduction 20
- CHAPTER 2 21
- MAGNET SYSTEM DESIGN 21
- INSTALLATION, AND OPERATION 21
- Magnet System Design 2-3 23
- 2-6 Magnet System Design 26
- Magnet System Design 2-7 27
- 2-8 Magnet System Design 28
- CHAPTER 3 29
- INSTALLATION 29
- 3-2 Installation 30
- 3.2 REAR PANEL DEFINITION 30
- TERMINAL SCREW 32
- WIRE FERRULE 32
- VOLTAGE SELECTOR CARD 32
- VOLTAGE INDICATOR KEY 32
- 3-6 Installation 34
- 3.3.6 Wiring Cover 34
- NO SWITCHES EMERGENCY STOP 35
- REMOTE ENABLE 35
- ALARM CONTACTS 35
- TO REMOTE ALARM CIRCUIT 35
- VALVE AND SWITCH 36
- SOLENOID VALVE 37
- WITH MOUNTING BRACKET 37
- ADJUSTABLE HOSE CLAMP 37
- REINFORCED HOSE 37
- 230 mm (9 in) LONG 37
- LUG COVER 38
- 3-12 Installation 40
- 3.12 DETACHABLE HANDLES 40
- 3.13 RACK MOUNTING 40
- CHAPTER 4 41
- OPERATION 41
- +70.0000 A +35.000 V 42
- Operation 4-3 43
- 4.4 KEYPAD DEFINITION 43
- 4-4 Operation 44
- 4.5 DISPLAY SETUP 44
- 4.6 SETTING OUTPUT CURRENT 44
- Operation 4-5 45
- 4.7 CURRENT RAMP RATE 45
- 4.8 RAMP SEGMENTS 45
- 4-6 Operation 46
- Ramp Segments (Continued) 46
- 4.9 PAUSE RAMP 46
- 4.10 ZERO OUTPUT 46
- Operation 4-7 47
- 4.11 MAXIMUM SETTING LIMITS 47
- 4-8 Operation 48
- 4.12 MAGNET WATER 48
- 4.13 INTERNAL WATER 48
- 4.14 ERROR STATUS DISPLAY 48
- Operation 4-9 49
- 4.16 LOCKING THE KEYPAD 49
- 4-10 Operation 50
- 4.17 COMPUTER INTERFACE 50
- CHAPTER 5 53
- COMPUTER INTERFACE OPERATION 53
- 5.1.2 Remote/Local Operation 54
- Message Strings (Continued) 56
- 5.1.4 Status System 56
- 5.1.4.1 Overview 56
- Register Method Example 59
- *ESE, *ESE? 60
- ERSTE, ERSTE? 62
- *SRE, *SRE? 64
- IBCONF.EXE.eps 71
- 5.1.5.3 Program Operation 72
- 5.1.6 Troubleshooting 72
- 5.2.1 Changing Baud Rate 73
- 5.2.2 Physical Connection 73
- 5.2.6 Message Flow Control 75
- 5.2.7.2 Program Operation 79
- 5.2.8 Troubleshooting 79
- 5.3 COMMAND SUMMARY 80
- CHAPTER 6 91
- OPTIONS AND ACCESSORIES 91
- 6-2 Options and Accessories 92
- CHAPTER 7 93
- SERVICE 93
- 7-2 Service 94
- 7.3 LINE VOLTAGE SELECTION 94
- 7-4 Service 96
- Figure 7-3. Circuit Breaker 96
- Service 7-5 97
- 7.6 ERROR MESSAGES 97
- 7-6 Service 98
- Table 7-3. Operational Errors 98
- 7.7 ELECTROSTATIC DISCHARGE 98
- 7-8 Service 100
- DIGITAL BOARD 101
- LOCATOR PINS 102
- MOUNTING SCREWS 102
- 7-12 Service 104
- 7.10.3 Auxiliary Connector 104
- Pin Name 104
- 7-14 Service 106
- Service 7-15 107
- Pin Symbol Description 107
- 7-16 Service 108
- 7.11 CALIBRATION 108
- 7.11.1 Calibration Interface 108
- 7-18 Service 110
- Service 7-19 111
- 7-20 Service 112
- Service 7-21 113
- 7-22 Service 114
- APPENDIX A 115
- GLOSSARY OF TERMINOLOGY 115
- – 1855) a German 117
- Factor Prefix Symbol 119
- APPENDIX B 121
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