Siemens HydroRanger 200 HMI, Руководство по эксплуатации, Страница: 109 / 404

Operating
7.6 mA I/0
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
107
7.5.1 Wiring the discrete inputs
The contacts of the signalling device connected to the discrete inputs may be Normally Open
or Normally Closed.
Example
Normal state for a backup high level switch is open, and the contacts on the discrete input
are wired as normally open. This logic can also be reversed (Normally Open to Normally
Closed or vice versa). Use the Discrete Input Logic (2.9.2.) (Page 209) parameters to set the
state of each discrete input.
7.5.2 Adjusting the discrete input logic
The default for discrete inputs is Normally Open, which is an Inactive state because no
signal is present on the terminal block connector. It becomes Active only when a signal is
present on the terminal block. To change between Inactive and Active, use Discrete Input
Logic (2.9.2.). (Page 209)
7.6 mA I/0
To integrate the device with other equipment, use the mA input and outputs. The mA input
can be used as a Level measurement or can be passed on to a SCADA system.
7.6.1 mA Input
Level reading parameters
Parameter Value Description
Transducer (2.1.5.) (Page 164) mA input Transducer = mA input
mA Input Range (2.6.1.) (Page 184) *4 to 20 mA Scale = *4 to 20 mA
0/4 mA Level Value (2.6.2.) (Page 184) 0 4 mA = 0% of span
20 mA Level Value (2.6.3.) (Page 184) 100 20 mA = 100% of span
mA Damp Filter (2.6.4.) (Page 185) 0 Do not damp the input signal
To pass the mA input on to a SCADA system, read the value from the appropriate
communication registers. For more information, see Input/output (R41,070 – R41,143)
(Page 331).