Liquisys M CPM223/253 Operability
Endress+Hauser 29
5Operability
5.1 Quick operation guide
You have the following ways of operating the transmitter:
• On site via the key field
• Via the HART interface (optional, with corresponding order version) per:
– HART handheld terminal or
– PC with HART modem and the FieldCare software package
• Via PROFIBUS PA/DP (optional, with corresponding order version) with:
PC with corresponding interface and the FieldCare software package (see Accessories) or
via a programmable logic controller (PLC)
For operation via HART or PROFIBUS PA/DP, please read the relevant sections in the
additional Operating Instructions:
•PROFIBUS PA/DP, field communication for Liquisys M CXM223/253,
BA00209C/07/EN
•HART, field communication for Liquisys M CXM223/253, BA00208C/07/EN
The following section only explains operation via the keys.
5.2 Display and operating elements
5.2.1 Display
LED display
Indicates the current operating mode, "Auto" (green LED) or
"Manual" (yellow LED)
Indicates the activated relay in the "Manual" mode (red LED)
Indicates the working status of relay 1 and 2
LED green: measured value within the permitted limit, relay
inactive
LED red: measured value outside the permitted limit, relay active
Alarm display, e.g. for continuous limit value overshoot.
Temperature sensor failure or system error (see error list)
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