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Default
Description
Name/Value
No.
N/A
These parameters are not used by the adapter module when the
module is configured for Modbus/TCP
Reserved
16 ...
18
99
Defines the reference multiplier/actual value divisor for the ad-
apter module.
T16 scale
19
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.
Reference multiplier/actual value divisor
0…65535
20
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.
Timeout time
20
• 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.
Modbus/TCP timeout value
0…65535
2 = Control
WR
Selects which Modbus/TCP register accesses reset the timeout
counter.
Timeout mode
21
The Modbus/TCP timeout feature is disabled.
0 = None
The timeout counter is reset when any Modbus register of the
drive is accessed.
1 = Any message
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.
2 = Control RW
1 = HILO
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.
Word order
22
The first register contains the low order word and the second re-
gister contains the high order word.
0 = LoHi
The first register contains the high order word and the second
register contains the low order word.
1 = HiLo
Modbus/TCP – Start-up 29
12
Summary of Contents for FMBT-21
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Page 75: ...Appendix A ABB IP configuration tool for FMBT 21 75 ...
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Page 84: ...84 Appendix D FMBT 21 configuration web pages ...
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