RKC INSTRUMENT Z-TIO-G, Инструкция по эксплуатации

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6. RKC COMMUNICATION
6-2
IMS01T28-E4
6.1 Polling
RKC communication uses the Polling/Selecting method to establish a data link. The basic procedure
follows ANSI X3.28-1976 subcategories 2.5 and B1 basic mode data transmission control procedure (Fast
selecting is the selecting method used in SRZ).

The Polling/Selecting procedures are a centralized control method where the host computer controls the
entire process. The host computer initiates all communication so the controller responds according to
queries and commands from the host.

The code used in communication is 7-bit ASCII code including transmission control characters.
Transmission control characters used in SRZ:
EOT (04H), ENQ (05H), ACK (06H), NAK (15H), STX (02H), ETB (17H), ETX (03H)
( ): Hexadecimal
Data send/receive state can be monitored by using our communication tool (PROTEM2).
The communication tool (PROTEM2) can be downloaded from the RKC official website:
https://www.rkcinst.com/.
6.1.1 Polling procedures
Polling is the action where the host computer requests one of the connected SRZ to transmit data.
An example of the polling procedure is shown below:
SRZ send
SRZ send
ID: Identifier
Host
computer
send Host
computer
send
[ Data ] or [ BCC ] [ ID ]
(5)
(3)
(4)
(9)
(7)
(10)
Host computer send
No response
No
response
Indefinite
Time
out
(8)
(6)
E
N
Q
E
O
T
E
O
T
S
T
X
E
T
B
E
T
X
E
O
T
A
C
K
N
A
K
E
O
T
(1) (2)
[Address] [ ] [ ID ]
Memory area number
When polling
the data corresponding
to the memory area