MITSUBISHI ELECTRIC FX2N - Manual (Page 20)

FX2N-32DP-IF Profibus-DP Interface Unit Introduction 1
1-10
2) Check total I/O points and the loading on the 24 V DC service supply. For the loading on the
24 V DC service supply, refer to Figurer 1.4.
This configuration is OK as the total I/O points are less than 256. It is also OK with the load-
ing on the 24 V DC service supply, this configuration can supply 250 mA at 24 V DC service
supply for other usages.
3) Check the total allowable exchanged data length for each input data and output data in the
DP-master, because this number might be limited by the DP-master unit.
Maximum exchanged data length of 32DP-IF can be found in Table 3.3. For the data length
of connected extension units/blocks, refer to Table 1.3.
*1 This value is maximum exchanged data length of 32DF-IF.
*2 This example configuration use A series programmable controllers A1SJ71PB92D (soft-
ware version is E). This DP-master is limited to 244 bytes of input data and 244 bytes of
output data.
This configuration is OK as the each total input data and total output data length is less than
200 bytes.
Table 1.9: Check Total I/O Points and the Loading on the 24 V DC Service Supply
Units/Block Name
Addressable I/O 24 V DC Service Supply
Inputs
(X)
Outputs
(Y)
Special
Function
Blocks
(X/Y)
Sum I/O Sum
FX
2N
-32DP-IF 0 0 -
Inputs (X) = 16
Outputs (Y) = 16
+ 250 mA
According to Figure 1.4
FX
2N
-16EX-ES/UL 16 0 -
FX 2N -16EYT-ESS/UL 0 16 -
FX 2N -4AD - - 8 - 0 mA
FX 2N -4DA - - 8 - 0 mA
FX 2N -4DA - - 8 - 0 mA
16 16 24
This configuration can supply 250 mA at
24 V DC service supply for other usages.
Total I/O is 56 points <256 points
Table 1.10:Check Total Exchanged Data Length
Units/Blocks Name
Exchanged Data Length
Input Data Output Data
FX 2N -16EX-ES/UL 2 bytes 0 byte
FX 2N -16EYT-ESS/UL 0 byte 2 bytes
FX
2N
-4AD 8 bytes 0 byte
FX
2N
-4DA 0 byte 8 bytes
FX
2N
-4DA 0 byte 8 bytes
Total exchanged data length
10 bytes < 200 bytes
*1
<244 bytes
*2
18 bytes < 200 bytes
*1
<244 bytes
*2