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Supported device types and ver=
sions
Communication =
line configuration
Lin=
e protocol parameters
Communication station configuration
Station protocol parameters
Status of station (transmitter), error attributes
I/O tag configuration Literature
Changes and modifications
Document revisions
This protocol supports data reading and writing to the devices "Transcon= DAP 128TC data transfer system, the communication format D" and "Temar PRE= S-COM V2.00".
If there is used only data reading from the central unit Transcon CU-16,= or Temar PRES from the transmitter on the lines, the communication may be = connected directly to the communication computer. In case of full duplex tr= ansmission there is required the communication concentrator KPX-02. It is d= ue to strict timing and synchronization of data that are sent to the centra= l unit in synchronization of the received data. Its application firmware "D= AP128 V1.00" executes correct synchronization of transmitted data to the ce= ntral unit, which are received from the master communication computer async= hronously. The central unit CU-16 is connected on the port A KPX-02 and the= communication computer on the port C KPX-02. The both ports are fitted wit= h the connectors DB9M.
The physical communication lines of DAP 128TC can be equipped with so-ca= lled transmitters or receivers. Every physical line can be fitted with at t= he most 16 transmitters/receivers, the address 0 up to 15.
The system Transcon DAP 128TC in D communication format supports 16 phys= ical lines. Temar PRES supports 8 physical lines.
The transmitter contains 7 inputs. Their values can be received by D2000= System as I/O tags, value type Digital input (Di) or Analog input (Ai) or = Cardinal input (Ci). The values Ai/Ci are 8-bit, serialized in eight cycle.= Input No. 8 is an odd parity, which is used to check the transmission of i= nput data on the inputs 0 to 6.
Each receiver / transmitter is configured as the single station. D2000 c= ommunication line is shared by all the lines of particular device Transcon = CU-16 (16 physical lines) or Temar (8 lines), i.e. it uses the interface RS= 232 on device. The number of physical line, on which the receiver / transmi= tter is placed, is configured in the station address.
Configuration dialo=
g box - tab Protocol parameters.
The parameters of line influence some optional parameters of protocol. You=
can define the following parameters:
Table 1
Parameter | Meaning | Unit | Default value |
---|---|---|---|
Protocol mode | Enables to choose a protocol mode. | DAP 128TC format D PRES-COM V2.00 |
DAP 128TC format D |
Read Only Mode | Activates the mode which enables only data readi= ng from the transmitters. Data sending to the receivers is disabled. | YES/NO | NO |
Wait Timeout | Delay between the line readings. | ms | 50 ms |
Inactivity Timeout | Timeout for receiving of valid data. If, after t= he lapse of time any valid packet is not received, the stations (transmitte= rs) are switched to the status of communication error. | sec | 10 sec |
Moxa Timeout | When using a redundant configuration of MOXA NPo= rt serial/UDP converters on SerialOverUDP Device Redun= dant line, it defines a timeout to switch over between them if an error= occurs on a converter which is currently active (being used for communicat= ion). | sec | 10 sec |
Debug Packet Binary Contents | Enables a display of debug info that contains th= e binary data. | YES/NO | YES |
Station Status Debug | Shows a debug info about the station status (tra= nsmitters) after it receives a valid packet (parity errors etc.). | YES/NO | NO |
Conf=
iguration dialog box - tab Protocol parameters
The parameters of line influences some optional parameters of protocol. Yo=
u can define the following parameters of station:
Table 2
Parameter | Unit | Default value | |
---|---|---|---|
Module type | Type of station - Transmitter or receiver. | Transmitter Receiver |
Transmitter |
In case of communication error, the value of communication station = switches immediately to the status of soft communication error COMM_ERR. If= the error repeats, the station switches to the status HARD_ERR (hard error= ) according to the setting of parameter Time filter. As two cycles of read= ing per second are executed, the station can switch to the HARD_ERR status = very quickly.
The error statuses are indicated by the attributes of value of the commu= nication station. There are used these attributes of value:
I/O tag types: Di, Ai, Ci, Dout.
I/O tag address is the number of input/output on the module in the range= of 0 to 6 (receiver) or 0 to 7 (transmitter). The input 7 has the value an= odd parity on the inputs 0 to 6 and can check the functionality of the tra= nsmitter. The status of transmitter parity is also signaled the error attribute.
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