Setting Rack Numbers; I/O Control Unit And I/O Interface Unit Displays - Omron SYSMAC CVM1 Series Operation Manual

I/O Control Unit and I/O Interface Unit Displays

2-5

Setting Rack Numbers

2-6

I/O Control Unit and I/O Interface Unit Displays

Display Mode 1
22
I/O words are allocated to Units mounted on the CPU, Expansion CPU, and CV-
series Expansion I/O Racks by rack number, regardless of the order in which the
Racks are connected. The CPU Rack number is fixed at 0, so I/O bits are always
allocated first to Units on the CPU Rack. Set the rack numbers of Expansion
CPU and Expansion I/O Racks to unique numbers between 1 and 7.
Be sure to set the rack numbers before registering the I/O table.
Note The PC Setup can be used to control I/O word allocation to Racks and override
allocation by rack number. Refer to Section 7 PC Setup for details.
The rack numbers for Expansion CPU and Expansion I/O Racks are set with the
rack number switch (RACK No.) on the I/O Interface Unit mounted on the Rack.
Set the rack number with a standard screwdriver after turning off the Rack power
supply and be careful not to damage the switch groove.
Note 1. A duplication error will occur if 2 or more Racks have the same rack number.
2. If a rack number is set to 8 or 9, the Rack will not be recognized by the CPU.
The I/O Control Unit and I/O Interface Unit have four-character 7-segment dis-
plays on the front. There are four display modes that display various information
from the CPU, and the current display mode is indicated by the position of the
decimal point on the display, as shown in the following diagram.
Lit in mode 1
Lit in mode 2
Lit in mode 3
Lit in mode 4
Pressing the mode selector switch changes the display to the next mode. The
Unit will automatically enter the mode specified in the PC Setup (default setting:
mode 1). Refer to Section 7 PC Setup for details.
If the CPU Rack power supply is OFF or an initialization error has occurred, the
displays will show "––––" and the rack number will be displayed when the mode
selector switch is held down, but the mode will not be changed.
In mode 1, the first I/O word allocated to that Rack is displayed. If the I/O table
hasn't been registered yet, or an error occurred during registration, the display
will show "0000." In the following example, the first word allocated is CIO 0036.
Indicates mode 1.
Word
Word Word
36 37 38
16- 16-
pt. pt.
I/O I/O
Section 2-6