Internal Communication Specifications P5 - SMC Networks ITV23 Series Operation Manual

Internal communication specification
■Process data
Process data is cyclic data exchanged periodically by [E-P regulator - PLC].
Process data consists of PD_IN (process data input): 4 byte and PD_OUT (process data
output): 2 bytes.
The process data of this product is Big-Endian type.
When the transmission method of the upper communication is Little-Endian type, the byte
order will be changed.
Refer to the table below for the Endian type of the major upper communication.
Endian type
Big-Endian type
Little-Endian type
Process data input: 4byte [E-P Regulator - PLC]
bit offset Item
0 SSC1
1 and 2 Disabled
Diagnostic information (notification)
3
Refer to P6
Diagnostic information (warning)
4 to 10
Refer to P6
Diagnostic information (abnormal)
11 to 15
Refer to P6
Output pressure value
16 to 31
Refer to P5
Output pressure value
Output pressure value of the product is sent.
31 30 29 28
Monitoring of output pressure
The output pressure can be monitored by the PLC receiving the output data from the E-P
regulator where the output pressure is 13-bit. (The upper 3-bit (29th to 31st) are 0).
<Relation between the output pressure value (16-bit) and output pressure>
Output pressure value
Output pressure
Check the values from the 16th to 28th bit of the 32-bit (4-byte) process data.
(Ex.) When the output pressure is 100%, the set pressure value is 0x0FFF.
Upper communication protocol
PROFINET etc.
EtherNET/IP™, EtherCAT etc.
0
27 26 25 24
Output pressure value (16-bit)
0 x 0000
0%
Note
Turns ON when the output pressure is
within +/-10%F.S. of the set pressure.
Not used. The value is not reflected.
0: Normal
1: Notification (defined per bit)
0: Normal
1: Notification (defined per bit)
0: Normal
1: Notification (defined per bit)
No symbol 16-bit
23 22 21 20
0 x 0FFF
100%
(When F_1=0%F.S. and F_2=100%F.S.）
- 5 -
1
19 18 17 16
byte
bit
value