ABB FMBT-21 User Manual page 29

No. Name/Value Description
16 ... Reserved These parameters are not used by the adapter module when the
18 module is configured for Modbus/TCP
19 T16 scale Defines the reference multiplier/actual value divisor for the ad-
apter module.
Note: The parameter is effective only when the following condi-
tions are satisfied:
• transparent 16 profile is selected
• drive is using the native communication profile (e.g, DCU or
FBA)
• drive is using a 16-bit transparent reference 1/actual value 1.
Reference 1 is multiplied by the value of this plus one and the ac-
tual value 1 is divided by the value of this plus one. With value 0,
the reference 1/actual value 1 scale in the adapter module is 1 = 1.
With ACS380, ACx580 and ACS880: Generic reference type:
1 = (T16 scale + 1)/100 -> T16 scale = 99,
1 = 1.
0...65535 Reference multiplier/actual value divisor
20 Timeout time Defines the Modbus/TCP timeout value. The Modbus protocol
does not specify a timeout mechanism for the application layer.
A timeout mechanism may be desired when controlling a drive,
so the adapter module provides a method for this purpose.
• If the parameter value is zero, this feature is disabled.
• If the parameter value is non-zero, the timeout is:
• (Modbus/TCP timeout value) * 100 milliseconds
For example, a value of 22 results in a timeout of:
22 * 100 milliseconds = 2.2 seconds
If a timeout occurs, the adapter module signals the drive that
communication with the client has been lost. The drive configura-
tion then determines how to respond.
Example: If the Modbus/TCP timeout is 300 ms and the drive is
configured to fault on a communication failure with a delay of 500
ms, the drive will fault 800 ms after communications is lost.
0...65535 Modbus/TCP timeout value
21 Timeout mode Selects which Modbus/TCP register accesses reset the timeout
counter.
0 = None The Modbus/TCP timeout feature is disabled.
1 = Any message The timeout counter is reset when any Modbus register of the
drive is accessed.
2 = Control RW The timeout counter is reset when the drive receives either a new
Control word or new reference value (REF1 or REF2) from the
Modbus/TCP client.
22 Word order Selects in which order the 16-bit registers of 32-bit parameters
are transferred. For each register (16-bit), the first byte contains
the high order byte and the second byte contains the low order
byte.
0 = LoHi The first register contains the low order word and the second re-
gister contains the high order word.
1 = HiLo The first register contains the high order word and the second
register contains the low order word.
Modbus/TCP – Start-up 29
Default
N/A
99
20
2 = Control
WR
1 = HILO
12