# Dual (B2 and RQS)

To set the CG1018 to operate with B2 or Coolguard (RQS) server in **DUAL** mode define:

**URL\_MAC=0** and **URL\_DUAL=1** 

The settings shown below set **DUAL** mode and define server IP address as **81.91.10.237**. 

The alarms signaled by the unit are selected basing on the user name at the end of SERVICE\_URL line which are HUS\_CH1 and HUS\_CH2 in the example. 

In the other words, the unit will activate the channel, when the user, which is defined in the SERVICE\_URL line, will see an active alarm in the system.

{% code overflow="wrap" %}

```sh
# B2 or RQS (only reads temperature-alarms of two URL's)
#URL_DUAL=0 -> Uses the SERVICE_URL to get status from server (older behaviour of Blixtljus where a single URL controls both relays)
#URL_DUAL=1 -> Uses the two URL's SERVICE_URL_CH1 and SERVICE_URL_CH2 to control the two relay outputs individually, only temperature-alarms (ie. 1x) from URL will control the outputs (server's communication alarm status is ignored).
URL_DUAL=1
SERVICE_URL_CH1="http://81.91.10.237/strobelight.aspx?User=HUS_CH1"
SERVICE_URL_CH2="http://81.91.10.237/strobelight.aspx?User=HUS_CH2"
```

{% endcode %}

In DUAL mode the CG1018 polls two URL’s, and an active alarm on an assigned URL controls CH1 and CH2 relays respectively. This can be used when you want to use both relays to indicate two different active alarms.

The URL’s in the example look like this, with each URL controlling a specific relay (CH1 or CH2):

```sh
SERVICE_URL_CH1="http://81.91.10.237/strobelight.aspx?User=HUS_CH1"
SERVICE_URL_CH2="http://81.91.10.237/strobelight.aspx?User=HUS_CH2"
```

The Dual URL’s are formatted in the same way as the single URL used by the old standard, there are just two of them.


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