Chapter 5. Trss Functions - IBM 3745 Service Functions

o
o
o
D
Connect or Disconnect a TRA
1. You must be in the TRS function (see page
5-5).
2. Select the TRA as explained on page 5-6.
3. Type 2 in the TRSS function selection screen
(see Figure 5-2 on page 5-5), then press
SEND.
4. The TRA connection and disconnection screen
( II)
is displayed
5. In
D,
enter CT (connect), or OS (disconnect).
6. The new status of the TRA is reflected in the
MSA (see "MSA Field Definition
(Token-Ring/TIC Information)" on page 1-18).
If the control program does not accept the discon-
nection, this screen is displayed. It may be nec-
essary to force the disconnection, if you want to
obtain a dump, or a display, of the registers:
• Press F5 to ignore the message and force a
disconnect, or
• Press F6 to quit, if you do not want to force
the disconnection.
Warning: TRA disconnect is required after every
power OFF/ON procedure before running the
TRSS diagnostics, if not' TAOA fails.
TRA Status Explanation
1 SELECT
2 CONNECT/DISC
3
TRM REGS
TIC INTR REG
DPL Y STORAGE
DUMP
DPL Y SCB.SSB
DPL Y PARM BLKS
9 TIC ERR STAT
Connect TRA
TRA CONNECT IDISCONNECT
TYPE CT TO CONNECT
OS TO 01 SCONNECT ==>
D
Fl :END
F2:~lENU2
F3:ALARM
Figure 5-5. TRA Connect/Disconnect Selection Screen
D
1
SElECT
2 CONNECT/DISC
3 TRM REGS
TIC INTR REG
DPL Y STORAGE
6 DUMP
7 DPLY SCB.SSB
DPL Y PARM BLKS
TIC ERR STAT
TRA CONNECT 101 SCONNECT
TYPE CT TO CONNECT
OS TO DISCONNECT ==>
CP DOES NOT ACCEPT THE TRA DISCONNECTION
Fl :END F2:MENU2 F):ALARM
1i ••
iHIUIU
F6:QUIT
Figure 5-6. TRA Force Disconnect Screen
Connect The TRA is running under the control of the control program. The control program
handles all interrupts (except in the case of an MIOH error).
Disconnect
Unknown
The Pia disable and disconnect bits in the TRM level 1 error status are OFF.
The TRA does not run under the control of the control program but under the control of
the MOSS microcode. The MOSS handles all interrupts and PI as to/from the TIC.
The Pia disable and disconnect bits in the TRM level 1 error status are OFF.
A non-recoverable error occurred during the connection/disconnection process, or an
MIOC/IOC error occurred while getting level 1 error status during TRA selection.
Connect/disconnect may be retried.
Chapter 5. TRSS Functions
5-7