MDD-256/T Control Unit User Manual Issue 1W21en ©gazex’2018 v1806 Page 9/ 22
5.5 Entering the correct password will be confirmed by an intermittent acoustic signal. The controller enters the
setting mode. At this stage, all control and measurement procedures are suspended until the configuration
of the device is completed. The first item from the user menu is displayed on the LED screen. The below list
shows all available functions:
- [ d.nEt ]– DET.NET bus – configuration of the network of devices connected to the detector bus;
- [ d.dEt. ]– manual configuration of parameters of individual devices, i.e. DD, MDP-1.A/T, … ;
- [ d.out. ]– turning executive devices on/off, i.e. MDD-L32,… ;
- [ d.Scn. ]– automatic scanning, refreshing of device addresses in the existing network;
- [ d.Add. ]– adding new devices to the existing device network;
- [ d.dEL. ]– deleting the DET.NET network device parameters stored in the MDD memory, together
with zeroing out the addresses for all devices connected to the bus;
- [ o.nEt ] – OUT.NET bus - configuration of transmission parameters for an external bus;
- [ out. ] – module outputs – parameter settings;
- [ o._|-|_. ] – defining the on/off delay of the outputs;
- [ o.Fun. ] – defining the operating modes of the outputs;
- [ o.Zon. ] – assigning outputs to zones;
- [ SErv. ] – service functions;
- [ PASS. ]– password change;
- [ tESt ]– testing the module outputs;
- [ d.rSt. ]– setting the MDD zero mode, triggering detector bus zeroing;
- [ FAcT. ] – restoring factory settings;
- [ dISP. ] – special functions of the LED display;
- [ vAL. ] – defining the mode of displaying device parameters;
- [ LooP ] – switching the cyclic mode on/off;
- [ .... ]– automatic exit from the menu;
The LED screen displays only one function that is active at a time. In order to change the function to
another one, use the keys [ ▲ ] or [ ▼ ]. Confirm the selection of the function with the [ OK ] key.
To exit the menu, scroll through all available menu functions with [ ▼ ].
Pressing the [ OK ] key next to a specific function will enter the sub-menu. Moving in the sub-menu of the
respective function is similar to moving in the main menu - selection of the parameter by means of the [ ▲ ]
and [ ▼ ] keys, confirmation by means of the [ OK ] key.
The following sections provide a detailed description of the parameters of the individual MDD functions.
5.5.1 [ d.nEt. ] – Configuration of the DET.NET bus.
The first menu item groups all the functions required to configure the DET.NET bus, i.e. the detector
(module) network, correctly. From this level, the user defines the parameters of the devices, assigns network
addresses to the devices, refreshes the network content after changes, etc. The available functions are
described below.
5.5.1.1 [ d.dEt. ] - Detector parameters – parameter list:
This function is recommended when the DET.NET bus has already been configured, the devices are working
properly, and the parameters of the individual devices need only be manually changed. In this case, the user
knowing the addresses of the detectors to be reconfigured, selects specific slaves from the range [ d.001 ] ÷ [
d.224 ], and then changes the settings of the specific detector. It should be remembered that after choosing
the slave address, the MDD forces the user to correctly configure all parameters of a given detector (it is
necessary to go through the full configuration path and reconfirm all parameters of the detector).
Changes in the detector settings are made in real time, i.e. correct communication between the MDD and the
selected detector is required during parameter configuration.
If the MDD does not communicate with the detector, it signals this with a continuous acoustic signal and
blocks the possibility of changing the detector's parameters. In this case, the detector can only be switched
on/off and assigned to a specific zone.
If the MDD communicates correctly with the detector, this is indicated by an intermittent acoustic signal and
enables full configuration of the parameters of the selected detector. The new parameters are stored in the
MDD memory and in the detector memory.
The following are the configuration steps for a single detector. Always make changes by pressing the [ ▲ ]
and [ ▼ ] keys, confirm the settings by pressing the [ OK ] key. When confirming the selection of a given
option or group of options, the MDD sends a command to the detector. A correct change is indicated by an
intermittent acoustic signal (new settings are stored in the MDD memory and in the detector memory). Lack
of communication or failure to execute the command is signalled by a continuous signal (changes are not
made). Once all required settings have been confirmed, the detector automatically returns to the detector list.
a) Selecting the detector number from [ d.001 ] ÷ [ d.224 ].
Select a number that matches the slave address of the detector. Any changes will only apply to the
selected detector.
