MKS Ophir Helios, Руководство пользователя, Страница: 17 / 39

First version
Rev 1.00
22 Sep 2016
Helios User Manual 17
Measurement Results & Information:
Byte Register Units Length Read/Write
22-25 Latest power measurement mW 4 bytes Read
26-29 Latest irradiation time measurement
μs
4 bytes Read
30-33 Latest energy measurement mJ 4 bytes Read
34-37 Present power (* Note 3) mW 4 bytes Read
38-39 Temperature of Helios device °C 2 bytes Read
40-41 Current energy scale (index) N/A 2 bytes Read
42-45 Maximum energy in current scale J 4 bytes Read
46-47 Active laser option index (1..5) (* Note 4) N/A 2 bytes Read
48 Active laser name character #1 (of 4) (* Note 5) Ascii 1 byte Read
49 Active laser name character #2 (of 4) Ascii 1 byte Read
50 Active laser name character #3 (of 4) Ascii 1 byte Read
51 Active laser name character #4 (of 4) Ascii 1 byte Read
52..63 (Spare) N/A 12 bytes Read
* Note 3: ‘Present power’ value can be returned negative, value is 4 bytes signed integer
* Note 4: ‘Active laser option index’ is the index of the presently selected laser option. Up to 5 laser options
may be available. The actual number of options available is reported in bytes 20-21, ‘Number of supported
laser options’, see above.
* Note 5: The name of the active laser is reported as Ascii coded characters, up to 4 characters long. For
example “NIR ” (=near infra-red) will be reported as “0x4E, 0x49, 0x52, 0x20” where the last character is
filled with a blank space (Ascii character 0x20).
Commands:
Command Register Length Read/Write
0x00 Clears bits 13-15 of status register 1 byte Write
0x01 Set energy scale to 10 kJ (max) 1 byte Write
0x02 Set energy scale to 1 kJ (max) 1 byte Write
0x03 Set energy scale to 100 J (max) 1 byte Write
0x08 Open cover 1 byte Write
0x10 Close cover 1 byte Write
0xA1 Set laser option 1 (* Note 6) 1 byte Write
0xA2 Set laser option 2 1 byte Write
0xA3 Set laser option 3 1 byte Write
0xA4 Set laser option 4 1 byte Write
0xA5 Set laser option 5 1 byte Write
0xFE
Clear bit 12 of status register “Exposure time error” bit
1 byte Write
* Note 6: The active laser option can be set to index 1 by sending command 0xA1, or to index 2 by sending
0xA2, etc. The number of laser options available is reported in bytes 20-21, ‘Number of supported laser
options’. The name and index of the active laser option (the one currently selected) is reported in bytes 46-
51, see above. **Attempting to set the laser to an undefined option will cause an error message
‘Undefined command’, bit 13 of the status register. Successfully setting the laser option will set ‘Change in
parameters – acknowledge’, bit 14 of the status register.
Example of sequence of commands and status:
These sequences show examples of how to control the Helios and check the status. The check of status can be omitted
but is added for clarity. The Status Register values are shown in the Little Endian format (EtherNet/IP), when using
Big Endian (Profinet) the bytes will be reversed (for example, 81 01 instead of 01 81).
1. To open & close the cover: