Visara SCON-25L Reference Manual - Manual (Page 28)

SCON-25L/28L/3074 Console Concentrator
1174-25S Communications Server Hardware Reference Manual
2-18 707028-007
ONLN (green): This is the ONLINE LED. This LED is lit when the Channel Interface
is logically connected to the channel. The Channel Interface must be on-line to respond
to selections by the mainframe. The Channel Interface cannot go on-line if the channel
is disconnected or down.
FAIL/ERR (amber): This is the FAIL LED. This LED is lit at power up, but goes off
within 5 seconds if the Power-up Self-Test (POST) passes. During normal operation
this LED is lit if the receive ESCON signal is not present or is invalid.
Switches
Debug SW: Recessed push-button switch. Pressing this switch causes the on-board
code to enter a special debug mode (monitor). The debug mode should only be used
under the direction of a Visara Engineer. If the debug mode is entered, the board will no
longer operate normally on the channel. If the debug switch is accidentally pressed, the
ESCON card should be reinitialized (re-download software). Please note that
reinitializing the ESCON card may require the 25S/25L/28L/3074 to be IMLed.
Connectors
Fiber Optic Transceiver: This connector is used for attachment of ESCON fiber
optic cable.
Attaching the ESC/ESX Interface to the Channel
Follow the steps below, to connect an ESCON cable between the ESCON host channel
and the 25S/25L/28L/3074:
1. Vary off-line the host channel that will attach to this ESC. Refer to your
mainframe operating system manuals for instructions.
2. Connect an ESCON fiber optic cable between the 25S/25L/28L/3074 and
the host.
3. Vary online the host channel.
4. A “505-01” connection code on the 25S/25L/28L/3074 display indicates that
proper communication is established. Connection problems may exist if the
plug does not click when placed into the ESC receptacle. Ensure the ESCON
plug is not loose.
RS232 Serial Interface
Serial Port
A serial port is provided with the ESC, FET and VHP cards, but is not functional.