ObjectC 100
Programmer's
Guide
8
http://csa.cedes.com/
© CEDES Safety & Automation AG
2.2.5.6.
Get number of beams (18 [12 Hex])
Indicates the number of beams in the attached light curtain.
Table 13: Command 12 Hex
Command 18 [12 Hex]
Response 19 [13 Hex]
Bit
Value
Bit
Value
Byte 3
0-7
0-254
Number of used beams
Byte 4
0-7
0-254
Number of physical beams
Byte 3 - 8
0 - 7
0
(not used)
Byte 5-8
Not
used
Note: The used beams count from "fb_offset" to "lb_offset", considering the pitch factor
2.2.5.7.
Trigger (1 standard scan) (20 [14 Hex])
When a standard scan is triggered, the object height will be ascertained by monitoring the condition of the entire
light curtain. Only one scan will be carried out and then the beam information will automatically be sent enclosed
in response 21.
Table 14: Command 20 Hex
Command 20 [14 Hex]
Response 21 [15 Hex]
Bit Value
Bit Value
Byte 3
0-7
0
No beam interrupted
1-254
First interrupted beam 1)
Byte 4
0-7
0
No beam interrupted
1-254
Last interrupted beam 1)
Byte 5
0-7
0
No beam interrupted
1-254
Maximum number of interrupted beams
Byte 6
0-7
1-254
Number of used beams 1)
Byte 7
0-1 0
No
overheight
1 Overheight
Byte 3 - 8
0-7 0 Not
used
Byte 8
0-1 00
No
overhang
01 Front
overhang
10 Back
overhang
11
Front and back overhang
Note 1) The used beams count from "fb_offset" to "lb_offset", considering the pitch factor.
2.2.5.8.
Start permanent standard scan (22 [16 Hex])
In the event of a standard height measurement (standard scan) the object height will be ascertained by
monitoring the condition of the entire light curtain. Continuous scans will be executed and the lowest and highest
interrupted beams will be ascertained until the ‘stop’ command is received. This command lends itself well for
measuring various object types, even those that do not start at beam one or those with open spaces.
Sending command 22 anew, before sending command 24, will reset the scan counter and reset the status values
noted in command 24 (see 2.2.5.9)
Table 15: Command 16 Hex
Command 22 [16 Hex]
Response 23 [17 Hex]
Bit Value
Bit Value
Byte 3 - 8
0-7 0 Not
used
Byte 3-8
0-7 0 Not
used
