Fuji Electric FRENIC-VG Series, User Manual

Page: 27 / 346

5.1 Standard RS-485 Communications Ports
5-7
Chap. 5
USING ST
ANDARD RS-
485
5.1.4.2 Cables
To ensure the reliability of connection, use twisted pair shield cables for long distance transmission
AWG 16 to 26.
Recommended cable manufacturer: FURUKAWA Electric Co., LTD
AWM2789 Cable for long distance connection
Type (Product code): DC23225-2PB
5.1.5 Link functions
Communications functions such as RS-485 are called link functions. Command data (S range) is
used to access the inverter from the host via a link function to issue start, stop, and speed/torque
setting commands. Function code H30 and the "24: Link run selection signal [LE]" X function are
used to switch between (REM/LOC/COM) enabling the command data (S range) and enabling
commands issued from the actual terminal block and keypad. Refer to Chapter 4, Section 4.1 "Block
Diagrams for Control Logic" for more details.
Function code H29 and the "23: Allow link edit command [WE-LK]" X function are used to control
writing to function codes (F, E, C, P, H, A, o, L, U) via the link function. Refer to Chapter 4, Section
4.1 "Block Diagrams for Control Logic" for more details.
5.1.5.1 Link command permission selection
Link switching
You can switch modes as shown below by assigning "24: Link run selection signal [LE]" to the X
function input terminal.
Link run selection signal [LE] assignment Input terminal Status
Not assigned -
ON
Link command allowed mode
Assigned
OFF Link command disallowed mode
In link command disallowed mode, writing command data and run operation data via the link
function is enabled, but the data is not reflected in the actual run operation. It is possible to set up the
data in advance in link command disallowed mode, and then switch to link command allowed mode
to reflect the data in the actual run operation.
• The run operation may start when the [LE] terminal is switched from OFF to ON.