Panasonic FP2 - Manual (Page 15)

Functions of Computer Communication Unit FP2−CCU
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1.4 Communication Conditions and Restrictions Relating to Functions
− “Multiple frames” means that, if a command or response exceeds 118
bytes, the command or response is divided into multiple segments and
transmitted or received.
For example, this applies in cases such as when a program is read from
a tool port, when commands, which continuously read multiple data, are
transmitted from a host side.
− If using the FP2SH CPU unit, the above restriction does not apply.
Tip
1.4.2 Precautions when Using the FP2 CPU Unit−2
Of the commands sent from a host computer or display panel, if the monitor commands
(the MC, MD, and MG codes) are used, they cannot be read accurately if two or more
devices within the same group are connected.
C C C
D D D
CPU
B
A
Power
supply
CCU CCU CCU
For example, if two or more display panels in the
same group are connected and the command
sent from the display panel side is a monitor com-
mand, it cannot be read accurately.
5 15 3 A M
¦ L
5 15 3 A M
¦ L
Group A CPU unit tool port . . . . .
Group B CPU unit COM. port . . . . .
Group C COM.1 port group of Computer Communication Unit . . . . .
Group D COM.2 port group of Computer Communication Unit . . . . .