6HBWDOG1
Heartbeat Relay
Connect
.Monitor
.
Control
.
3
DIP-Switch Settings
3.1 Setting DIP-Switches
Configuration:
Once installed in a system, the heartbeat signal must be configured. The controller is configured first to
toggle the discrete output which is connected to IN+/IN- at the desired frequency. Once the controller is configured in
this way the DIP switches located on the top of the Heartbeat Watchdog Module can be set to monitor the heartbeat
signal. Two time settings are provided in the Heartbeat Watchdog Module:
Boot Delay:
This time setting causes the Heartbeat Watchdog Module to wait a specific time after Power-Up or
Reset before monitoring the Heartbeat Input. The purpose for this delay is to provide sufficient time for the
system controller to boot up and begin toggling the heartbeat signal before the Heartbeat Watchdog Module
begins monitoring the signal. This time delay setting should be configured to account for the worst case boot
time of the system. If the boot delay is set too short, the Heartbeat Watchdog module will sense the lack of
input signal changes while the system boots as a failure of the system.
Heartbeat Timeout:
This time setting defines the maximum period between rising edges of the Heartbeat input
signal which indicates proper operation of the system. If the Heartbeat input period exceeds this time setting,
then the Heartbeat Watchdog Module will detect this as a failure of the system.
Each time setting is assigned to four DIP switches, and each group of four switches is divides into two pairs of
switches. One pair is used to configure a base time and the other pair will configure a multiplier for that base
time, so a wide range of times can be accommodated. The switch settings are shown in the diagram below:
As an example, if the intention is to set a boot delay of 100 seconds, switches 1-2 would both be set in the up
position for a time of 25 seconds, and switches 3-4 would be set down (3) and up (4) for a multiplier of 4. This
setting provides 25 seconds x4 for 100 seconds boot delay.
Another example using the heartbeat timeout switches for a desired heartbeat period of 5 seconds would be:
switches 5-6 set up (5) and down (6) for a 5 second time, while switches 7-8 would both be set down for a x1
multiplier. 5 seconds x 1 yields a heartbeat interval of 5 seconds. Power Wiring Alternatives
1 2 3 4 5 6 7 8
Boot
Delay
Heartbeat
Timeout
Time
Time
Multiplier
Time
Multiplier
DIP Switch Configuration Settings
1 Second
5 Seconds
10 Seconds
25 Seconds
Time Switch Positions
Timex1
Timex2
Timex4
1 Second
1 Second
Timex8
1 Second
1 Second
Multiplier Switch Positions
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