Electro-cam PS-6144 Series Bedienungsanleitung Seite 84
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6-12 Communications
Checksum
Calculating Checksum The PS-6144 calculates checksums in four steps:
1. Add the ASCII values of the command string, not including STX (!) or ETX (<CR>).
2. Make the decimal value from Step 1 negative.
3. Convert the value from Step 2 to hex.
4. Use the two least significant digits from Step 3.
The following examples will clarify how Checksums are calculated:
Example 1—Command 0A: Request RPM from Controller #1
Command: !010A<CSM><CR>
Checksum Calculation:
0 1 0 A
| | | |
48+49+48+72 = 217(decimal)
–217 decimal = FF27 hex; therefore: Checksum = 27
String sent to controller = !010A27<CR>
Example 2—Command 25: Add Pulse to Control #2
Pulse Values: Program 15, Output Channel 9, “On” at 25, “Off” at 290
Command: !02250E0800190122<CSM><CR>
Checksum Calculation:
0 2 2 5 0 E 0 8 0 0 1 9 0 1 2 2
| | | | | | | | | | | | | | | |
48+50+50+53+48+69+48+56+48+48+49+57+48+49+50+50 = 821(decimal)
–821 decimal = FCCB hex; therefore: Checksum = CB
String sent to controller = !02250E0800190122CB<CR>
Error Codes
Error Replies If a command sent to the PS-6144 cannot be processed for any reason, the controller
sends a reply in the following format:
N <error code> CSM <CR>
The error codes are listed below.
Code Name Meaning
00 OK Processed ok.
01 BAD BUFFER Buffer not correct.
02 NOT OUR ADDRESS To someone else.
03 BAD COMMAND Illegal command.
04 BAD DATA Illegal data.
05 NOT IN MOTION Can’t do while running.
06 TOO MANY TIMERS Too many timers for time base.
07 NOT AN OPTION Option not on unit.
08 NOT STOPPED Can’t do this unless STOPPED.
09 BAD FORMAT Bad input or output format string.
0A TIMEOUT Timeout error.
0B BAD KEY Illegal key value.
0C FLASH ERROR Flash programming error.
0D BAD PROGRAM# Illegal program number.
0E BAD CHANNEL# Illegal channel number.
0F KEYBOARD CONFLICT Conflict with keyboard activity.
- PS-6144 Series 1
- Table of Contents 3
- Mechanical Cam Switches 5
- Programmable Limit Switches 5
- PS-6144 Description 6
- Basic Terminology 7
- PS-6144 Standard Features 7
- PS-6144 Optional Features 8
- General Mounting & Wiring 9
- PGM:1 RPM:1500 10
- MENU< POS: 180 10
- 2-3 Installation & Wiring 11
- 2-4 Installation & Wiring 12
- Controller Input Wiring 13
- 2-6 Installation & Wiring 14
- 2-7 Installation & Wiring 15
- Output Wiring 16
- Output Wiring (cont’d) 17
- Keypad Wiring 20
- DIP Switch Configurations 21
- Communications Wiring 23
- Resolver Installation 24
- Resolver Dimensions 25
- Resolver Cables 26
- Output Transistor Replacement 28
- Menu Tree 30
- Initial Programming 31
- OFFSET 3-16 31
- Analog Module Numbe 32
- Analog High RPM 32
- Analog Offset 32
- Number of Analog Output 33
- Communications 34
- Channel Copy 34
- Communications (Cont’d) 35
- Default Program 35
- LEVEL: OPERATOR 36
- PASSWORD: 1234 36
- Password Number 36
- View Program 37
- --- --- --- Program 37
- Enable Codes (cont’d) 37
- GROUP POSITION 38
- DISPLAY: EACH< 38
- Machine Speed 39
- Active Program 39
- Keyboard Quantity 40
- Input Status 40
- Motion ANDing 42
- Memory Tests 42
- Motion detection leve 43
- High RPM setpoint 43
- Low RPM setpoint 43
- Value for this Group 44
- 3-17 Programming 45
- Output Enable ANDing 46
- Output Groups 46
- Output Groups (Cont’d) 47
- Output Status 47
- Password 48
- Output Status (Cont’d) 48
- Password (Cont’d) 49
- Per Channel Enable 49
- Program Copy 49
- Pulse Copy 50
- Program Select Mode 50
- Pulse Copy (cont’d) 51
- Rate Setup 52
- SCALE 53
- FACTOR: 360< 53
- Program to view or modify 54
- Setpoints (Cont’d) 55
- CH:1 EDG 55
- Output Channel 56
- Speed Compensation (cont’d) 57
- Speed Comp Mode 57
- Timed Outputs 58
- Toggle RPM 58
- 4-1 Speed Compensation 59
- Standard Speed Comp 60
- Standard Speed Comp (Cont’d) 61
- Leading Trailing Speed Comp 62
- 4-5 Speed Compensation 63
- Speed Comp Guidelines 64
- Negative Speed Compensation 64
- Mode 1 Operation 67
- Mode 0 Operation 67
- Mode 2 Operation 68
- Mode 1 Operation (Cont’d) 68
- Mode 2 Operation (Cont’d) 69
- Mode 3 Operation 69
- Mode 4 Operation 70
- Mode 3 Operation (Cont’d) 70
- Mode 4 Operation (Cont’d) 71
- Mode 5 Operation 71
- Mode 5 Operation (cont’d) 72
- 6-1 Communications 73
- PLuSNET II Program (cont’d) 74
- 6-3 Communications 75
- Serial Commands 76
- Serial Commands (cont’d) 77
- Output group offset value 80
- Shaft position offset 80
- Checksum 84
- Error Codes 84
- 6-13 Communications 85
- 40279 Offset Mapping 86
- Motion Detection 86
- 40289 Analog High RPM 86
- Quick Reference 86
- 40310 Analog Quantity 87
- Discrete I/O 88
- Registers 89
- Registers (Cont'd) 90
- 40280 Group Index 91
- 40281 Group Offset 91
- 40288 Analog Offset 92
- 40308 Shaft Position 93
- 40309 Shaft Offset 93
- Bit 5: Motion detection 95
- Special Functions 98
- Controller Diagnostics 99
- Keypad Diagnostics 100
- ERROR: RESOLVER 101
- NOT CONNECTED! 101
- General Troubleshooting 102
- 7-5 Troubleshooting 103
- Fuse Part Numbers 104
- PS-6144 Controller Specs 105
- A-2 Appendix 106
- Resolver Specifications 107
- Factory Defaults 107
- A-4 Appendix 108
- Access Codes, Entering 3-20 109
- Analog Output 3-4 109
- Group Position Display 3-10 109
- Offset, Analog Output 3-4 110
- I-3 Index 111
- PRINTED IN U.S.A 256 10/01 112
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