Delta MMC120 User Manual Page 97
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MMC120 Linear Motion Control Module Appendix B: Event Control
Delta Computer Systems, Inc 360/254-8688 97
Linking Steps
Link Next
Link Next is the number of the Step to be executed in the sequence as soon as the conditions specified by Link
Type and Link Value are met. Its range is 0 to 255.
Link Type and Link Value
Link Type and Link Value specify the condition which causes the MMC120 to execute the next Step in a
sequence. There are two link types: Basic and Enhanced. The Basic Link Types issue commands to an axis
based on its own position, speed, or status. The Extended Link Types issue commands to an axis based on the
position, speed, or status of the other axis. The Basic link types are case-significant ASCII values, while the
Extended link types are specified with a hex number in which the bits specify the axis number and link type.
Basic Link Types
Link Type Description Link Value Range
0 (zero) End of chain None None
B Status bits set Bit pattern Any bits
b Status bits cleared Bit pattern Any bits
D Delay Time in milliseconds 0 to 65,535
L Programmable Limit switch
(Target Position set-point)
Position in Position Units 0 to 65,535
l Actual position Position in Position Units 0 to 65,535
N Relative from Command
Position
Position in Position Units 0 to 65,535
n Relative from Actual Position Position in Position Units 0 to 65,535
R Target Position relative from
Start
Position in Position Units 0 to 65,535
r Actual Position relative from
Start
Position in Position Units 0 to 65,535
S Target Speed Speed in Position Units per
second
0 to 65,535
s Actual Speed Speed in Position Units per
second
0 to 65,535
Link Type 0 (zero) - End of sequence
When this Link Type is encountered the sequence of steps is terminated. No additional steps are executed
unless they are started as a new sequence.
Link Type B - Status bit on
This Link Type causes the MMC120 to execute the next Step in the sequence as soon as one of the selected
status bits is set to 1. The Link Value for Link Type B is a bit pattern expressed in hexadecimal. For example,
bit pattern 0000 0000 0001 0000 binary is 0010 hex, and specifies bit 12 (State Bit A, indicating acceleration).
If this bit is set the next Step will execute.
- Linear Motion Control Module 1
- Rev 1.00 1
- Printed in U.S.A 2
- Contents 3
- OVERVIEW 9
- Drive Outputs 10
- SPECIFICATIONS 11
- Bus Compatibility 12
- Fail Safe Timers 12
- DESCRIPTION 13
- Maximum Speed 14
- Deceleration Ramp 14
- Acceleration Ramp 14
- FRONT PANEL INDICATORS 16
- SETUP CHECKLIST 17
- PREPARING FOR INSTALLATION 18
- Hydraulic System Notes 21
- Initialization Parameters 22
- Moving The Axis 23
- Open Loop Procedure 24
- Jogging The Axis 26
- MOTION CONTROL PARAMETERS 27
- CONFIGURATION Word Bit Map 29
- SCALE Calculation Examples 30
- OFFSET (Default: 0) 31
- Motion Control Commands 35
- ACCELERATION (Default: 1000) 36
- MODE Word Bit Map 37
- DECELERATION (Default: 1000) 38
- SPEED (Default: 1000) 38
- COMMAND VALUE 38
- Move Profiles 39
- MMC120 Initial Move Profiles 40
- Readback Parameters 41
- COMMAND POSITION 43
- TARGET POSITION 43
- TRANSDUCER COUNTS 44
- ACTUAL SPEED 44
- STATUS Word Bit Map 45
- FLASH MEMORY 46
- COMMUNICATING WITH THE MMC120 47
- I/O Register Overview 48
- Output Registers 49
- COMMANDS 49
- Command Types 50
- Input Registers 65
- QUANTUM PROGRAMMING HINTS 66
- TROUBLESHOOTING 67
- The axis oscillates 68
- HYDRAULIC SYSTEM PROBLEMS 69
- Pumps and Accumulators 70
- Identification and Correction 70
- If the speeds show: 72
- REPAIRS AND RETURNS 73
- GLOSSARY OF TERMS 74
- ASCII TABLE 75
- Description 76
- General Features 76
- DCS120 Default Startup Screen 77
- Stall.plt 78
- Screen After Installation 79
- The DCS120 Screen 80
- Summary of Keyboard Commands 81
- Alt Key Commands 82
- Additional keys 82
- Diagnostic Graphs 83
- Keyboard Commands 84
- Variable Datalogging Rates 85
- Moving Axes Simultaneously 86
- Table Editors 86
- Advanced Features 87
- Setting Up Advanced Features 87
- Initialization File 88
- Project Files 90
- .FNn (Function Key) example: 91
- User Notes 93
- MMC120 Communication Cable 94
- Appendix B: Event Control 95
- Step Table 96
- Linking Steps 97
- Step Execution 99
- Starting a Sequence 100
- Using DCS120 101
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