Communications Examples - Fuji Electric FRENIC-AQUA series User Manual

4.1.4

Communications examples

Typical communications examples are shown below (the station number is 12 in all cases):
[ 1 ] Standard frame
(Example 1) Selecting S01: speed setting 1 (write)
10 Hz command x 20,000/maximum frequency 50 Hz = 4000d = 0FA0
Request frame (host ⇒ inverter)
SOH 1 2
ACK frame (inverter ⇒ host)
SOH 1 2
NAK frame (inverter ⇒ host) ... Link priority error
SOH 1 2
(Example 2) Polling of M09: output frequency (read)
Request frame (host ⇒ inverter)
SOH 1 2
ACK frame (inverter ⇒ host)
SOH 1 2
[ 2 ] Optional frame
(Example 1) Selecting of operation command (write)
Request frame (host ⇒ inverter) ... FWD command
SOH 1 2
ACK frame (inverter ⇒ host)
SOH 1 2
NAK frame (inverter ⇒ host)
The cause of the error can be confirmed with function code M26 (transmission error
transaction code).
SOH 1 2
(Example 2) Selecting of operation command in broadcast (write)
Request frame (host ⇒ inverter) ... REV command
SOH 9 9
The inverter does not respond to broadcast.
ENQ W S 0 1
ACK W S 0 1
NAK W S 0 1
ENQ R M 0 9
ACK R M 0 9
ENQ f 0 0 0
ACK f ETX D
NAK f ETX E
ENQ f 0 0 0
4-13
SP 0 F A 0
SP 0 F A 0
SP SP SP 4 C
SP 0 0 0 0
SP 0 B B 8
1 ETX 9 2
2
1
2 ETX A 2
4.1 Messages
H
ETX 7 D
ETX 7 E
ETX 5 D
ETX 5 3
ETX 8 0