Shadow 8 User Manual
1139300
Installation and Checkout
2-47
Enabling External Device Monitoring (EDM) (Receiver Switch 2)
External Device Monitoring, or EDM, is a safety function that monitors the Shadow 8
interface to the guarded machine, checks to ensure that the control elements are responding
correctly to the light curtain, and detects any inconsistency between the two external control
devices. EDM detects any malfunction within the interface that prevents a stop signal from
reaching the machine controller. Table 2-8 shows selector switch settings for EDM.
If you enable EDM by setting SWA 2 and SWB 2 to “ON,” you must also set SW1 EDM on
the Main board in the optional Shadow 8 control box (see Wiring Shadow 8 to EDM Monitor
Inputs, page 2-41) as follows:
•
If the optional control is wired directly in series with the machine’s E-stop circuit without
any external relays, set SW1 EDM to “INT” (see figure 2 at the back of the manual)
•
If the optional control is wired to external relays, set SW1 EDM to “EXT” (see figures 3
and 4 at the back of the manual)
•
If the optional control is wired to a Wintriss Clutch/Brake Control, set SW1 EDM to “INT”
(see figures 5 through 9 at the back of the manual).
Setting Scan Codes (Receiver Switch 3, Transmitter Switch 1)
Scan codes are used to minimize cross-talk between two pairs of light curtains installed near
one another. To prevent interference between the two sets of heads, one pair is set to scan
code A, the other to scan code B. The receiver and transmitter in each pair must be set to the
same scan code. Table 2-9 shows the selector switch settings.
Table 2-8. External Device Monitor (EDM) Settings: Receiver Switch 2
Option
Receiver
SWA Switch 2
Receiver
SWB Switch 2
EDM Disabled
OFF
OFF
EDM Enabled (Default)
ON
ON
WHEN SHADOW 8 HEADS ARE WIRED DIRECTLY TO WPC, SET EDM TO “DISABLED”
If you have wired your Shadow 8 Main Receiver and Transmitter to a WPC 1000 or WPC 2000
control, you must disable the EDM function on Receiver switch 2. Set the switch to “OFF” (see
figures 11 through 13 at the back of the manual).
Table 2-9. Scan Code Settings: Receiver Switch 3, Transmitter Switch 1
Option
Receiver
SWA Switch 3
Receiver
SWB Switch 3
Transmitter
Switch 1
Scan code A (Default)
OFF
OFF
OFF
Scan code B
ON
ON
ON
NOTICE
Содержание Shadow 8
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