Toshiba V Series User Manual page 94

Chapter 4 Registration Using Engineering Tool 2
About LDU (LD512H)
LDU registration shall be made with LDC, LDP and LDB of the LP (Controller).
LDU: Whether its controller tag should be displayed or not to LDU (Yes/No) (Underlined value is
the initial value)
LDP: Decimal point digits of PV and SV to be indicated on the numeric display (0/1 to 4)
LDB: Display type of PV and SV for bar graph display (Bar graph / Point display)
4
Relation between the LDU station number and the display loop
The LDU is equipped with a rotary switch to specify the station number (the station number of the
LDU built in the LC511/LC512 is fixed to 1). The rotary switch setting range for external LDU is 1
(Station 2) to 7 (Station 8). The station number is a device management number and differs from
the loop number actually displayed. However, when power is turned on, the loop number
corresponding to the station number will be displayed (in this example, loop 1 (LP[0]) for LC511
front panel, loop 2 [LP[1]] for external LDU) and then the loop display can be changed by the
operation from the LDU front panel or by the instruction from an application program (see E.1
"System Variable (ZW)"), the loop display can be changed.
If any loop not registered (LDC = Nothing) is displayed to LDU, all information will be displayed in
"0" and the operation becomes invalid.
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Supplementary explanation
Supplementary explanation
Model 1000 Loop Controller L1 LC511, 522 User's Manual