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6. BUFFER MEMORY (BFM)
A S S E W E M T -
The f?X-16NP/NT-S3 interface block uses its built-in buffer memory (%-word RAM
without
battery
back@) for communications with the A series PC. The buffer memory is assigned,with
the
numbers
as shown below.
FX to A
TRANSMIT BUFFER MEMORY
(WRITE-ONLY)
1
BFM
No.
#O
Memory data
I
~
#1
Data
is written from the FX series
PC to each BFM by a
TO
instruc-
tion. The mitten data is then
transferred to the A series PC.
#26
#27
*
#28
**
#29
**
Error code (See the following page.)
#30
**
Information code: 7001 (NP-SS), 7002 (NT-S3)
#31
**
Unusable
- -
Set value of the station number setting switch
(1 to 61)
m
4 to FX
RECEIVE BUFFER
MEMORY '(READ-ONLY)
BFM
No.
#O
*
Memory data
#1
*
Data is written from
the
A
sen'es
PC to
each BFM.
The written
#26
*
data
is then transferred to the
FX
series PC by a FROM instruction.
#27
*
#28
**
#29
**
Error code (See the following page.)
#30
**
Information code: 7001 (NP-SS), 7002 (NT-S3)
#31
**
Unusable
Set value of the station number setting switch
(1
to 61)
The BFM numbers indicated by the
*
symbol are write-only memory. Reading by the FX series PC by
a FROM instruction is denied.
The BFM numbers indicateq-by the
**
symbol are read-only memory. Writing from the FX series PC
by a
TO
instruction is denid?:
,'*
.
.
, I
.
I
.
a
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