USER MANUAL FOR F.I.O. INSTALLATION - Pietro Fiorentini

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7.1.2.13 Flow rate limitation The function “Flow rate limitation”, if enabled, always verifies that the flow rate is kept under the limit set in this page. When the flow rate starts to exceed the threshold, the ECU starts to decrease the setting of the pilot activating the decreasing solenoid valve until the flow rate is stabilized around the threshold value. When the flow rate decreases under the threshold, the ECU increases again the setting of the pilot activating the increasing solenoid valve until bringing back the downstream pressure to its set-point. Clicking on “Modify” it is possible to set: - If the limitation is enabled or disabled. - The threshold of the flow rate that the system has to limit. - Dead band: in % of the threshold of flow rate. When the flow rate exceeds the threshold, the ECU decreases the setting of the pilot until the flow rate returns within the value represented by the threshold ± the dead band. In the example, supposing that the threshold is at 1000 Sm³/h, the ECU activates the decreasing solenoid valve until the flow rate reaches 1000 Sm³/h ±5%, i.e. until it stays between 950 Sm³/h and 1050 Sm³/h. in this range the ECU remains in limitation status. F.I.O. User’s Manual ENGLISH - Sensibility: in % of the threshold of flow rate. The ECU, after reaching the dead band, controls if the flow rate of the regulator exits above or below the range of sensibility. In the example the flow rate must remain between 1000 Sm³/h ±10%, i.e. between 900 Sm³/h and 1100 Sm³/h. If the flow rate exceeds this range, the ECU brings back the flow rate inside the dead band, and stops. If the flow rate drops below, it increases again the setting of the pilot activating the increasing solenoid valve until is reached again the downstream pressure to its setpoint. - Minimum pressure: A value of minimum pressure under which the limitation of flow rate cannot lower the downstream pressure. - Flow rate verification time: time between a verification of the flow rate and the following one, is recommended the minimum of 30 sec. It is possible to increase this time with multiples of 30 seconds (60, 90, 120, etc.). - Limitation time-out: time within the flow rate must reach the dead band. If not, when the time-out is reached the modulation is blocked and moved to the status of FAIL. Max. value 32000 seconds in multiples of 30 seconds (60, 90, 120, etc.). 7.2 Complete configuration with DMS For the remote programming through the DMS please refer to the DMS manual. In case of GPRS communication, is suggested to set the following parameters on P&CD before starting the connection with DMS: - On “Master table \ Date and time” set the current date and time (see item 7.1.1.2) - On “Master table \ Alarm configuration” (see item 7.2.1) - On “Master table \ Periodic tasks” (see item 7.2.2) - On “Master table \ Modem” (see item 7.2.3) Verify, finally, on “Master table \ Device identification”, the ID number of P&CD matching with the one configured on DMS profile. F.I.O. User Manual – Ed.2. Rev.5 Page 36/ 53 The information contained in this document is confidential and the property of Pietro Fiorentini S.p.A. Technical data may undergo changes without notice
7.2.1 Alarm configuration Enter the IP address (for the GPRS), for example 151.8.135.75, or the telephone number (for the GSM), i.e. +3933576…. of the Remote center that the P&CD has to dial for the periodic or requested connection for the data download. “Phone number 1” has the higher priority, “Phone number 8” has the lower priority. In case of no connection dialing Phone n°1, the modem of P&CD will try to dial the Phone n°2, and so on. 7.2.2 Periodic tasks Is possible to set the frequency of the download of the data to DMS, the hour and the minute of the call. In this example, the P&CD will call the DMS once a day at 17:30. 7.2.3 Modem For the GPRS connection is necessary to enter the APN, user name and password of the mobile operator. F.I.O. User’s Manual ENGLISH F.I.O. User Manual – Ed.2. Rev.5 Page 37/ 53 The information contained in this document is confidential and the property of Pietro Fiorentini S.p.A. Technical data may undergo changes without notice
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USER MANUAL FOR F.I.O. INSTALLATION - Pietro Fiorentini

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