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31. Why do I get wrong values when reading a PCD2/3.W340 with media mapping?

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    PCD2.M5xx0 and the PCD3.Mxxx0 systems equipped with firmware 1.10.16 did not correctly calculate the temperature values of NI1000 temperature sensors measured with PCD2/3.W340 input modules.

32. Why do I get the error "Missing value" when reading some M-Bus devices?

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    When reading values from some specific M-Bus devices with the M-Bus modules PCD2/3.F27xx, the M-Bus driver may show the error "Missing value" even though all values are correctly returned by the device.

33. Why do I get a "DUART HW ERROR" on PCD2.M150 after restart?

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    Communication on port 3 (PCD2.F520) during startup can lead to a DUART HW ERROR on the PCD2.M150

34. Why can't I read data from a CALEC aquametro energy master device?

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    In order to read data from "CALEC aquameter energy master" devices using the F27x modules (except PCD2.F2700 or PCD3.F270) the M-Bus FBox library 2.6.117 or later is required.

35. Why can't I connect a PCD3.M5xx0 over the serial PGU port?

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    While the serial PGU port of systems before the PCD3 did always work as PGU port when connecting a PCD8.K111, the serial PGU port of the PCD3 can be configured for using a modem. If this is done, it is no longer possible attaching a PCD8.K111 and establishing a PGU connection.

36. Why can't I change the Profi-S-Bus address on a PCD3.M6540 Port 2?

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    When using firmware version 1.08.23 the Profi S-Bus address can only be set one time on the PCD3.M6540 port 2.

37. Why are the inputs and outputs of a PCD3 systems not switched on and off correctly, or switched on and off randomly, or the I/O status not detected correctly in the PLC?

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    The problem may be related to a loose contact on the PCD3.K010 connectors used to connect the PCD3.M/Txxx CPU's and the PCD3.Cxxx expansion modules.

38. Why are the inputs 8100 and 8101 continously "high" in my fupla file?

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    It is possible to use the interrupt inputs (Int0 = i 8100; Int1 = i 8101) of a PCD2.M5xxx or PCD3.Mxxxx as normal input without using the corresponding interrupt XOB.

39. Why are broadcast telegramms not working anymore on the PCD3 or PCD2.M480

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    In firmware 03B and 03C an S-Bus broadcast telegram will block the communication interface until the next reboot of the PCD.

40. Why I get the error message "NAK response" during a program download (with PG5 SP2)?

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    On download of a big program with PG5 2.0.200 to a PCD1.M2xx0 or PCD3.Mxx60 the error message "Command not accepted: NAK response" can be returned by the downloader.