77
Operating and functions
10.6.4 Doing a dosing in dosing mode "EXT.+LOC."
Dosing mode "EXT.+LOC." allows for:
• selecting a dosing quantity from the memory of the device, via the navigation keys or the digital inputs,
• then starting the dosing via the digital input DI4 (only).
Danger
Danger due to electrical voltage.
▶ Disconnect the electrical power for all the conductors and isolate it before carrying out work on the system.
▶ Observe all applicable accident protection and safety regulations for electrical equipment.
→ Connect the valves to the DO2 and DO3 outputs: see chap. 8.14.
→ Wire the output DO4 and the digital inputs DI as described in Fig. 44, chap. 10.6.3, and depending on the
following requirements:
• the transistor output DO4 allows for transmitting the dosing state.
• the digital input DI4 allows for starting, interrupting, continuing or aborting a dosing. It also allows for confirming
an alarm, if the generation of alarms has been activated on the device (see chap. 10.7.16 and 10.7.17).
• the digital inputs DI1 to DI3 allow for selecting one of the 7 dosing quantities, entered into the device memory
(see Fig. 45, chap. 10.6.3). If all the 7 dosing quantities are not used, only connect the necessary inputs. When
a dosing has been interrupted, the digital inputs allow for the navigation within the pause menu, between the
function "CONTINUE" and the function "RESET". If the dosing quantity is selected via the navigation keys and
no dosing will be remotely aborted, inputs DI1 to DI3 can be left unconnected.
→ Restart the device:
• If the DI4 input is at the low level (not powered) when energizing the device, the four digital inputs will be active
at high level.
• If the DI4 input is at the high level (not powered) when energizing the device, the four digital inputs will be
active at low level.
→ Configure the device with this dosing mode: see chap. 10.7.10.
→ Do the dosing of a quantity stored in the memory and selected with the navigation keys, see Fig. 47.
→ Do the dosing of a quantity stored in the memory via the digital inputs, see Fig. 48.
• If the generation of alarms (alarm "DURING") for problems occurring during a dosing has been activated
(see chap. 10.7.16), an alarm is generated if there is no flow rate measured in the pipe whereas the
valves are open. See chap. 11.3.4 to solve the problem.
• If the generation of alarms (alarm "AFTER") for problems occurring at the end of the dosing has been
activated (see chap. 10.7.17), an alarm is generated if there is still flow in the pipe whereas the valves
are closed. See chap. 11.3.4 to solve the problem.
English
Type 8025 - 8035 - SE35 BATCH
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