Moeller S40-AM-TD, Руководство пользователя

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Data array size
11
02/02 AWB27-1300-GB
Data array size The size of the data arrays depends on the function block
type selected:
If the “TCMT1zB0“ or “TCMT1zU0“ function blocks are
selected, the data array is one-dimensional and is 1 to
220 bytes for send and receive data (
a fig. 3).
The data arrays in function blocks “TCMT1zU2“ and “U5“
are three-dimensional. These are defined by using the
parameters subaddress (0 to 255) and “offset address” (0 to
219) of type UINT (
a fig. 4). The third parameter specifies
the number of remote partner stations.
Separate data arrays are defined for all send and receive
data. In the example, the 256 send data arrays and 256
receive data arrays would be for the central station and one
send and receive data array for each of the 256 partner
stations. Ensure that the size of the send data array in the
central station is the same as the size of the receive data
array in the partner station and vice versa. In the example
therefore, the number of SD
1
send data units from the
central station must be the same as the number of RD
1
receive data units of the partner station.
The maximum size of all data arrays in a station is approx.
6.5 Kbyte for PS4-150/-200 and 13 Kbyte for a PS4-300/
PS416. In a central station this available range must be
shared equally amongst all other stations of the telecontrol
line.