The Network operator requires the following:
1) the input connected to a single or double input must be connected to the
output of the preceding unit in the local network.
2) the output connected to a STATUS signal or OSSD output, must be connected
to the input of the next unit in the local network.
3) the and inputs must be connected to input devices that act as Stop (e.g.
E-STOP) and Reset (e.g. SWITCH), respectively.
4) the input can be connected freely in the diagram (e.g. input function blocks or results of
logical combinations).
5) can be connected freely in the diagram. is 1 (TRUE) when the IN input is 1
(TRUE) and the function block has been restarted.
Parameters
when selected this allows the distribution network to reset the function
block. If not enabled, the function block can only be reset via the local input.
if selected this enables the presence of the status signal.
The RESET commands must be installed outside all the danger areas of the network
in positions where the danger areas and the entire work areas are clearly visible.
The maximum number of MASTER modules that can be connected in network
configuration is equal to 10.
Each Master module can have a maximum of 9 expansion modules connected.
With reference to the Figure 57 and Figure 58, at power-on:
1. The Net_out of the various nodes are in the 0 (FALSE) condition;
2. The STOP signal is sent via the Net_out line;
3. When the RESET command is pressed on one of the nodes all the nodes that are present are started when the
START signal is sent;
4. As the end result, the Net_out of all the connected nodes is in condition 1 (TRUE) if the various Net_in inputs
are in condition 1 (TRUE);
5. The RUN signal is sent via the network of the 4 nodes present.
With reference to the Figure 57 and Figure 58, when the emergency stop is pressed in one of the
four nodes:
1. The Net_out moves to condition 0 (FALSE);
2. The STOP signal is sent via the Net_out line;
3. The next node receives the stop code and deactivates the output;
4. The stop command generates the stop code for all Net_in and Net_out lines;
5. As the end result, the Net_out of all the connected nodes is in condition 0 (FALSE).
6. When the emergency stop is restored to the normal position, all the nodes can be restarted by sending the START signal
with a single reset. The latter condition does not occur when ENABLE RESET NETWORK is not enabled. In that case, the
local reset method must be used. The system will employ about 4s to restore all the outputs of the blocks that make up the
network.
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