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During online I/O Unit replacement, the slot number of the Unit that can be repla-
ced is displayed. In the following example, the Unit in slot number 8 can be re-
placed.
Indicates mode 1.
Indicates online replacement.
Indicates slot number being replaced.
In mode 2, the current CPU status and the rack number of that Rack are dis-
played. The information displayed by the four digits is listed below.
1, 2, 3...
1. The leftmost digit indicates whether or not the CPU is operating.
“
a
” indicates it is operating.
“
Ć
” indicates it is stopped.
2. The second digit indicates whether or not an error has occurred in the PC.
“
e
” indicates that a fatal error has occurred.
“
f
” indicates that a non-fatal error has occurred.
“
Ć
” indicates that no errors have occurred.
3. The third digit from the left indicates whether or not a Programming Device is
connected to the Rack (to the CPU Unit or I/O Interface Unit). If a Program-
ming Device is already connected, another cannot be connected.
“
b
” indicates that a Programming Device is connected.
“
Ć
” indicates that a Programming Device is not connected.
Note Only one Programming Device can be connected to a CPU Unit or I/O
Interface Unit for each PC, but three additional Programming De-
vices can be connected to the SYSMAC BUS/2 Slave Racks.
4. The rightmost digit indicates the rack number.
Indicates the CPU is in the RUN mode, a non-fatal error has oc-
curred, a Programming Device is connected, and the rack number
is 2.
Indicates the rack number
Indicates whether or not Programming Devices are connected.
: A Programming Device is connected to the CPU or to an I/O
Interface Unit.
: No Programming Device is connected to the CPU or to an I/O
Interface Unit.
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, the display shows a 4-character message when an IODP(189)
instruction is executed in the program for that Unit. The display mode of the des-
tination unit can be changed to mode 3 automatically by the instruction. Refer to
Section 5 Instruction Set for details on IODP(189).
Display Mode 2
Display Mode 3
I/O Control Unit and I/O Interface Unit Displays
Section 2-6
Summary of Contents for CVM1D
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