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ACH550 E-Clipse Bypass User’s Manual
Embedded fieldbus
Mailbox read/write
The ACH550 provides a “Mailbox” function to access parameters that have not been
pre-defined by the protocol. Using mailbox, any drive parameter can be identified
and read. Mailbox can also be used to adjust parameter settings by writing a value to
any parameter identified. The following table describes the use of this function.
1. As noted above, Modbus provides direct access to all parameters using the format: 4 followed by
the parameter number.
Name
Description
Protocol Reference
Modbus
1
N2
FLN
BACnet
Mailbox
Parameter
Enter the number of the drive parameter
to access.
Does not
apply.
AO19
95
AV25
Mailbox
Data
Contains the parameter value after a
read, or enter the desired parameter
value for a write.
AO20
96
AV26
Mailbox
Read
A binary value triggers a read – the value
of the “Mailbox Parameter” appears in
“Mailbox data”.
BO19
97
BV15
Mailbox
Write
A binary value triggers a write – the drive
value for the “Mailbox Parameter”
changes to the value in “Mailbox data”.
BO20
98
BV16
Summary of Contents for ACH550-BCR
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