Automated Logic MX400 Technical Instructions - Page 4

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Figure 3. Digital Output Wiring
Function Block's Parameter page, then make
sure the equipment actually operates as
specified.
Each digital output can be placed in Manual
or Auto mode by setting the HOA switches
(see Figure 1 on page 2 for the switches'
location). Table 1 shows the status of the
digital output based on the output's
configuration and the HOA switch position.
Table 1. HOA Switch Positions
On
Normally
DO
open
contacts
output
closed
Normally
DO
closed
contacts
output
open
Status page
ON
result (use
channel
numbers
81- 84)
You can monitor the status of the HOA
switches through SuperVision by assigning
each switch a digital input in the FB using
channel numbers 81 through 84. Channel 81
corresponds to HOA switch number one;
channel 82 corresponds to HOA switch two,
and so on.
An off status on these channels means the
HOA switch is in Auto mode. An on status
means the HOA switch is in Manual mode.
Revised 4/3/00 • MX400
D R Y
C O N T A C T
2 4 V A C
Off
Auto
DO
determined
contacts
by FB
open
programming
DO
determined
contacts
by FB
closed
programming
ON
OFF
Channel Numbers
The following table shows the valid channel
numbers for each point on the MX400. Enter
the channel number in Eikon before the
Function Block is made, or on the FB's
Parameter page in SuperVision.
Table 3. Digital Output Channel Numbers
Channel
Point
Signal Type
Number
Digital
11
DO 1
HOA Status†
81
Digital
12
DO 2
HOA Status†
82
Digital
13
DO 3
HOA Status†
83
Digital
14
DO 4
HOA Status†
84
† Use digital input microblocks to
monitor the status of HOA Switches.
Troubleshooting
LEDs
The MX400 module has several LED
indicators to show the status of certain
functions.
Power - lights when power is being supplied
to the module.
Run - flashes to indicate a normal condition.
Expander Comm - flashes to indicate
expansion bus communications are valid.
Digital Output Status - lights when the digital
output is activated.
Protection
The MX400 module is protected by internal
solid state Polyswitches on the incoming
power. These Polyswitches are not
replaceable and will reset themselves if the
condition that caused the fault returns to
normal.
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© 2000 Automated Logic Corporation