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3708 Bracket State Errors
State
BETB
INB
PEND.BB
RU Lengths
Error codes generated for bracket error conditions are as follows. The bracket state
conditions remain unchanged after sending the error code.
Chase
Chase
Cancel
Cancel
FMD
FMD
aodEB
aod ...,EB
BID
aodEB
aod ...,EB
aodBB
and ...,BB
X'2003'
-
-
X'2003'
-
-
X'2003'
-
-
X'0813'
-
-
X'080B'
-
X ',)001 ,
-
X'OR11'
X'?OO1'
-
-
X'?001'
Outbound to the 3708
The maximum RU length that a PLU can send is defined in byte 11 of BIND RU.
If a maximum RU size is specified (PLU maximum send size), the maximum RU
size received must be less than or equal to 32,767 bytes. A negative response with
sense code X'080A' (too long PIU) occurs if the PLU transmits an FM data RU
greater than 32,767 bytes. If a PLU maximum send size is not specified in the
BIND, no length check is made on an FM data RU transmitted by the PLU to the
3708.
Note: The recommended, and most efficient, RU size is 256 bytes.
Inbound from the 3708
The 3708 accepts only a Multiple Element Chains BIND for inbound operation of
display devices. The maximum RU length can be controlled by the PLU through
byte 10 of the BIND RU. For the 3708, the RU size transmitted inbound is no
greater than 256 bytes. If the value specified by byte 10 is greater than 256, the
BIND is accepted, but the actual RU size is limited to device capabilities. The
minimum value that may be specified by byte 10 of the BIND is 256 bytes.
If
a
lesser value is specified, the BIND is rejected with a negative response, sense code
X'0821'.
Chapter 3. SDLC and SNA Communication
3-47
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