PEB 2091
PEF 2091
Programming
6.7.2
Examples for Complete Loop-Back #2 Control
The typical procedure for closing and opening a complete loop-back is demonstrated in
the examples below.
Complete Loop-Back in EOC Auto Mode
NT
LT
C/I AR
(1000B) <––––– ; U-interface is activated
<––––– C/I AR
(1000B) C/I UAI
(0111B) –––––> ; without terminal
; confirmation
(–––––> C/I AI
<––––– C/I AI
(1100B)
; or with
(1100B) C/I AI
(1100B) –––––> ; terminal confirmation)
MON-0
LBBD
(50H)
<––––– ; Close complete loop (EOC)
<––––– C/I AIL
(1110B)
(50H)
; Request for downstream
<––––– MON-0
LBBD
; device to close complete
; loop-back
MON-0
LBBD
(50H)
–––––> ; Receive acknowledgment
–––––> MON-8
LBBD
(F1H)
; If downstream device can’t
; close, loop is closed in IEC
MON-0
RTN
(FFH)
<––––– ; Open all loop-backs
<––––– MON-0 RTN (FFH)
; All loop-backs opened
MON-0
RTN
(FFH)
–––––> ; Receive acknowledgment
In the above example the LT is operated in EOC Auto mode.
Semiconductor Group
237
Data Sheet 01.99
INFINEON [ Infineon ]
