Omron MC4700, Инструкция по установке и эксплуатации

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. . . . .
OMRON SCIENTIFIC TECHNOLOGIES INC.
Fremont CA USA
Tel: 1/888/510-4357 in USA and Canada
© OSTI 1209 PN99584-0050 Rev. E
Original Instructions
29
T
c
= the response time, in seconds, of the press or machine control circuit to activate the machine’s
brake.
NOTE!
T
s
+ T
c
is usually measured together by a stop time measuring device.
T
r
= the response time of the 4700 system, in seconds. This response time is given in Table 14-1 , Table
14-2 and Table 14-3 .
▲
!
WARNING!
When using a STI RM-1 with the 4700, add 0.008 seconds to the response times stated in
Table
14-1
,
Table 14-2
and
Table 14-3
.
T
bm
= the additional stopping time, in seconds, allowed by the brake performance monitor before it
detects stop time deterioration.
The T
bm
factor allows consideration for brake wear, adding extra stop time allowed by the brake
monitor. Therefore, T
bm
= Brake monitor set point - (T
s
+ T
c
).
NOTE!
If the guarded machine is not equipped with a stop time performance monitor, a percentage
increase factor should be applied to the stop time of the machine to allow for braking system wear.
Contact your machine manufacturer for information.
D
p f
= This is related to the minimum object sensitivity of the 4700 system. By knowing the minimum
object sensitivity, S, of the 4700 system, D
pf
is read directly from Table 5-5 , Table 5-6 , Table 5-7 or
Table 5-8 .
For a 4700 system with 12 mm minimum object resolution and without Exact Channel Select or
Floating Blanking active:
S = 0.47 inches (12 mm) and D
pf
= 0.67 inches (16.96 mm)
For a 4700 system with 20 mm minimum object resolution and without Exact Channel Select or
Floating Blanking active:
S = 0.79 inches (20 mm) and D
pf
= 1.75 inches (44.45 mm)
8.2 E
UROPEAN
S
AFETY
D
ISTANCE
F
ORMULAS
The following discussion is based on standard EN999 and applies to light curtains used in industrial
environments.
8.2.1
S
AFETY
D
ISTANCE
F
ORMULA FOR
S
YSTEMS WITH A
M
INIMUM
O
BJECT
R
ESOLUTION OF
40
MM OR
L
ESS
When the minimum object resolution of the system is 40 mm or less, use the following formula:
S = (K x T) + C
where:
S = the minimum distance in millimeters, from the danger zone to the detection point, line, plane or
zone.
K = 2000 mm/s
T = the overall system stopping performance in seconds.
T = t
1
+ t
2
t
1
= response time of the safety light curtain in seconds. This response time is given in Table 14-
1 , Table 14-2 and Table 14-3 .
t
2
= maximum stopping time of the machine in seconds.
C = 8(d-14 mm), but not less than zero.