ABB AC 800M, Configuration, Page: 127 / 260

Section 4 Configuration Communication Related Parameters
9ARD000014-600 A 127
COS Connection
The Change Of State (COS) Connection parameters in the hardware editor are
described in
Table 20 . Upon modification of the editable parameters, the connection
between LD 800DN and all DeviceNet slaves configured under it stops
momentarily.
Conn Poll
InputSize Depends on the
device support
as stated in its
EDS file Int Read
Only Number of bytes of data that gets
transferred from the device to the linking
device over the Poll connection.
Conn Poll
OutputSize Depends on the
device support
as stated in its
EDS file Int Read
Only Number of bytes of data that gets
transferred from linking device to the device
over the Poll connection.
Table 20. COS Connection Parameters
Parameter
Default
Value
Type
Read Only/
Editable
Description
Acknowledge
time 16 ms Dint Editable It is the amount of time that a producing node

(for example - DeviceNet slave) waits for an
acknowledgement (ACK) from the consuming
node (linking device LD 800DN) before it re-sends
the data.
Heart Beat 250 ms Int Editable It is the background production interval for the
change-of-state connection. It is the rate at which
the device produces the data, even if the data has
not changed.
Table 19. Poll Connection Parameters
Parameter Default Value
Data
Type
Read
Only /
Editable
Description