3 known ams (5.0) shortcomings – KROHNE BM 702 HART User Manual
Page 6
KROHNE Messtechnik GmbH & Co. KG · Ludwig-Krohne-Str. 5
! D-47058 Duisburg
6/10
Tel.: 0203-301 0
! Fax: 0203-301 389 · e-mail: [email protected]
Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART
instrument is in multidrop, changing of the ‘PV is’ value (Primary Variable code) affects only Primary Variable
digital value (and corresponding settings) whilst the current output function (‘Function I’ on the “Analog Output”
tab) remains switched “Off”. Otherwise - when the instrument has the ‘0’ bus address – changes in Primary
Variable assignment are traced at analog output and its function. And vise versa – when the ‘Function I’
parameter is changed, Primary Variable code is correspondingly changed. The only exclusion here is when the
‘Function I’ is set to “Off” – then the last meaningful assignment for PV (process variable or status data) is
retained.
5.3 Known AMS (5.0) Shortcomings
There are several insignificant shortcomings (all having workarounds) found during trials with AMS. Some of them
pertained also to the previous AMS versions, one (last mentioned) is new.
•
Losing of the “Service Code”. If after registration as specialist (refer to section 4.2), the user does not open the
“Configuration Properties” or “Process Variables” window, AMS will lose soon access to service functionality (i.e.
the correct service code), and the user will have to undertake the same actions (4.2) to re-establish access
rights. In case if any window is already open before the “Service Code” method is invoked, such loss doesn’t
happen.
•
Getting/releasing specialist access initiates a re-read process of the Service data package. And if the service
access rights are being changed when the “Service” configuration tab is active, the user is get prompted with the
“Error reading
(number depends on device implementation and some additional mutual parameters’ dependencies). No boring
messages are presented to the user, if any other window (except “Service” configuration tab) is active.
•
In case the instrument mode is changed (say, Conversion Table is removed), the faceplate (in case it was open)
does not reflect/trace the new mode (opposed to configuration tabs) and must be closed/reopen.