Manual VIPA CPU 21x Chapter 2 Hardware description
HB103E - Rev. 05/45 2-13
Components
The components of the CPU 21x that are described here are components
of all the CPUs presented in this manual.
The CPUs 21x have a number of LEDs that are used to diagnose bus
conditions and to display the status of a program. The table below
describes the diagnostic LEDs and the according colors.
These LEDs are part of every CPU in this manual.
Name Color Description
PW green Indicates CPU power on.
R green CPU status is RUN.
S yellow CPU status is STOP.
SF red Is turned on if a system error is detected
(hardware defect)
FC yellow Is turned on when variables are forced (fixed).
MC yellow This LED blinks when the MMC is accessed.
You can select the operating mode STOP (ST) and RUN (RN) by means of
the function selector. The CPU automatically executes the operating mode
START-UP when the mode changes from STOP to RUN.
You may issue an overall reset by placing the switch in the Memory Reset
(MR) position.
You may install a VIPA MMC memory card in this slot as external storage
device (Order No.: VIPA 953-0KX00).
The access to the MMC takes always place after an overall reset.
The CPU has an internal power supply. This is connected to an external
supply voltage via two terminals located on the front of the unit.
The power supply requires DC 24V (20,4 ... 28,8V). In addition to the
electronic circuitry of the CPU this supply voltage is used for the modules
connected to the backplane bus.
The electronic circuitry of the CPU is not dc-insulated from the supply
voltage. The power supply is protected against reverse polarity and short
circuits.
Note!
Please ensure that the polarity of the supply voltage is correct.
CPU 21x
LEDs
Function selector
RN/ST/MR
MMC slot memory
card
Power supply
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