4-2
4-1 General
<FB operating conditions>
System configuration:
One FB is necessary for each external device which is connected by RS-232C or RS-485 to one general purpose
communication module. However, when RS-232C/RS-485 signal conversion is enabled (the mode selection switch is set
to 4) for the general purpose communication module, each FB is used by two channels.
Processor
Non-procedural
FB
for RS-232C
External device
connected to
RS-232C
External device
connected to
RS-485
Non-procedural
FB
for RS-485
General purpose
communication
module
(normal mode)
Processor
Non-procedural
FB
for both channels
External device
connected to
RS-232C
External device
connected to
RS-485
General purpose
communication
module
(conversion mode)
* When used in RS-232C/RS-485 conversion mode, channel number for the parameter (PARA [1]) is 1 (= RS-485).
Memory capacity:
emaNBF
yticapacmargorP
)petS(
yromemecnatsnI
BFresurof
yromemdradnatS yromemniateR
yromemecnatsnI
metsysrof
eerf_C_6562sdrow204sdrow6563sdrow0sdrow28
252rfC_7572sdrow474sdrow4712sdrow0sdrow28
821rfC_7572sdrow474sdrow6881sdrow0sdrow28
46rfC_7572sdrow474sdrow8571sdrow0sdrow28
23rfC_7572sdrow474sdrow2761sdrow0sdrow28
rprfC_0911sdrow221sdrow8061sdrow0sdrow28
Note 1: The above memory capacity includes that of non-procedural FB itself as well as of the sub-FB which is called
from non-procedural FB.
Note 2: “Standard memory” or “Retain memory” includes the memory capacity necessary for data transmissin.
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