Omron CV500 Installation Manual page 45

Rack Components
Display Modes
32
The display mode selector allows one of four modes to be selected. By pressing
the switch successively, the four modes can be sequentially accessed. The cur-
rent mode is displayed in the form of a dot on the display. The following diagram
illustrates the four possible modes.
Lit in mode 1
Lit in mode 2
Lit in mode 3
Lit in mode 4
"0000" is displayed until the I/O Connecting Cables are connected properly.
Mode 1 displays the address of the first word on each Rack. The following exam-
ple illustrates the mode 1 display for a given Rack.
Indicates mode 1
Mode 2 indicates the operating status of the CPU as well as the rack number.
Indicates the CPU is in the RUN mode, a non-fatal error has occurred,
a Peripheral Device is connected, and the rack number is 2.
Indicates the rack number
Indicates whether or not Peripheral Devices are connected.
: A Peripheral Device is connected to the CPU or to an I/O Inter-
face Unit.
: No Peripheral Device is connected to the CPU or to an I/O Inter-
face Unit.
Note Only one Peripheral Device can be connected to the CPU and I/O
Interface Units for each PC, but three additional Peripheral De-
vices can be connected to the SYSMAC BUS/2 Slave Racks.
Indicates mode 2
Indicates the error status of the CPU.
: A fatal error has occurred.
: A non-fatal error has occurred.
: No error has occurred.
Indicates the operating status of the CPU.
: The CPU is operating.
: The CPU has stopped.
In mode 3, data can be output to the display by the I/O DISPLAY instruction
(IODP(189)). The binary information can be display in hexadecimal format (0 to
F) or as segments of a 7-segment display. For details on the I/O DISPLAY in-
struction, refer to the CV-series PC Operation Manual: Ladder Diagrams .
Mode 4 displays only the mode number dot.
Word Word Word
36 37 38
16- 16-
pt. pt.
I/O I/O
Section 2-3