RS-485 User's Manual MEH448d - Fuji Electric America
RS-485 User's Manual MEH448d - Fuji Electric America
RS-485 User's Manual MEH448d - Fuji Electric America
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2.3 Switching to Communications<br />
2.3.1 Functions for the switching<br />
Figure 2.9 below shows a block diagram via communications for frequency setting and operation<br />
commands.<br />
This block diagram indicates only the base of the switching section, and some settings may be<br />
given higher priority than the blocks shown in this diagram or details may be different due to<br />
functional expansion and so on. For details, see the <strong>User's</strong> <strong>Manual</strong> of each inverter model.<br />
(Chapter 4 for FRENIC-Mini/Eco/Multi, and Chapter 6 for FRENIC-MEGA)<br />
Operation commands herein include digital input signals via communications.<br />
According to the setting of function code H30 link function (operation selection), the command<br />
system when communications is valid is selected.<br />
Even if digital input is set to link enable (LE), when the link becomes invalid ("LE" = OFF), the<br />
command system switches from communications to other settings including digital input signal.<br />
In short, the frequency setting, forward operation command, and X1 signal in Figure 2.9 switch<br />
from communications dedicated function codes S01, S05, and S06 to terminals [12], [FWD],<br />
and [X1], respectively.<br />
Function code data can be read and written through communications regardless of the setting<br />
function code H30 (link function (operation selection)).<br />
Set<br />
frequency<br />
Host<br />
Forward operation<br />
command<br />
Digital input<br />
Digital input (link<br />
operation<br />
selection)<br />
Communications<br />
Set frequency for<br />
communications<br />
Set frequency for<br />
communications<br />
Operation command<br />
Terminal FWD<br />
(function selection)<br />
Operation command<br />
Turned<br />
ON at<br />
98<br />
Treminal REV<br />
(function selection)<br />
Operation command<br />
Operation command 1<br />
Turned<br />
ON at<br />
98<br />
computing unit Table of truth values of SO6 (bit<br />
13, bit 14)) computing unit<br />
*1 The code y98 (bus function: operation selection) is not available in FRENIC-Mini.<br />
Figure 2.9 Operation command block diagram via communications<br />
2-18<br />
to<br />
Link function<br />
Bus function*1 Link function<br />
for aid<br />
Link function<br />
Bus function*1 Link function<br />
for aid<br />
0.1<br />
to<br />
2,3<br />
-: Not assigned<br />
(The value of the assigned bit will be<br />
Link function<br />
Link function<br />
Bus function*1 for aid<br />
0.1<br />
to<br />
2,3<br />
Depends on the set function.<br />
Communications/Termin<br />
al block switching<br />
Frequency<br />
setting<br />
Forward<br />
operation<br />
X1 signal
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