5190/5194 Modular Tape Subsystem Manual

Operating the Cartridge Tape Drive and ACL
5190/5194 Modular Tape Subsystem Manual—426878-002
4-8
Controls on the ACL Front Panel
Message Panel
The message panel on the ACL control panel can simultaneously display up to eight
alphanumeric characters or symbols. These combine to form status messages. For
examples of status messages, see Understanding Operator Messages on page 4-28.
Status Indicator LEDs
The ACL control panel contains seven LEDs that indicate current operating conditions.
Table 4-3 lists the LEDs and summarizes their functions.
For more information on compression and the COMP (compression) LED, see
Controlling Data Compression (5190 Tape Drive) on page 4-44.
Table 4-3. ACL Front-Panel Status Indicator LEDs
LED Function
ATTN (Attention) Not used (always unlit)
AUTO Lights when the ACL is in the auto (default) mode
COMP (Compression) Lights when the drive reads or writes compressed or blocked data
DOOR LOCK Lights when the ACL magazine door is locked
MANUAL Not used (always unlit)
SEL (Selected) Flashes on and off when the drive formatter is polling the drive
SYSTEM Not used (always unlit)