Samsung Ht As700 User Manual

101
Specialty Module Dimensions
NX-IOLINK Module Dimensions
115 .5
35.0
RS232C COM1
RS485
RS232C COM2
RS485RESET
104 .0
AU I
T
12V
35.035.0
LINK NO00
0
FG
- +
+
-
F.G
NX-MWLINKMW LINKNX-SC USCUNX-ETHER N ETEtherN et
unit (mm)
+
-
FG
LINE
4
3
2
1
OFF
ON
MODE SW
24V D C
INPUT+
-105.0
70.5
unit (mm)
 

102
Decimal, Bin, Hex, BCD, Gray Code 
Cross-reference Table
 

103
ASCII Code Table
b4b3b2b101234567
00000NULDEL0@P`p
00011SO HDC1!1AQaq
00102ST XDC2“2BRbr
00113ETXDC3#3CScs
01004EO TDC4$4DTdt
01015ENQNAK%5EUeu
01106ACKSYN&6FVfv
01117BELETB'7GWgw
10008BSCA N(8HXhx
10019HTEM)9IYiy
1010ALFSUB*:JZjz
1011BVTESC+;K〔k{
1100CFFFS‘N∧n~
1111FSIUS/?O_oDEL
b8b7b6b5
b8
b700001111
b600110011
b501010101
C
R
SPA CE
 

104
 

105
Appendix
Communication Protocols
The communication protocol of NX-CPU700p PLC provides a complete 
method of communications between the graphic consol programmers 
(WinGPC) and the PLC by controlling programs, CPU status, and I/O at 
user’s convenience. The user can easily expand the capabilities of the 
overall PLC system by communicating to the PLC using a variety of 
peripheral communications equipment in accordance with the 
following communication protocols and procedures. Additionally, the...

106
Communication Protocols 
  
Q (Query) is a signal sent from the peripheral devices to the PLC after 
setting the network ID number and the function code for the PLC to 
communicate with. 
 
QA (Query Acknowledge) is a signal sent from the PLC to the 
peripheral devices, indicating that the Q signal from the peripheral 
device was received.
  
RR (Response Request) is a signal sent from the peripheral device to 
the PLC, indicating that the QA signal from the PLC was received. This 
signal is sent...

107
When several CPU modules are connected to one communication 
network, they must use individual ID numbers. The PLC’s network ID 
number is configured using the WinGPC.
Communication steps
The NX CPU can support 2-step or 4-step communication methods. 
The communication methods are easily distinguished each other by 
selecting and sending the function code of the Q frame. Even for the 4-
step method, the 2-step method can be used for the repeated function. 
This function sends and receives the only RR...

108
2-step communication method
4-step communication method
No communication error
Peripheral
device
PLC
Peripheral
device
PLC
Peripheral
device
PLC
When R is not received
Response to repeated function code
3 seconds
No communication error
Peripheral
device
PLC
Peripheral
device
PLC
Peripheral
device
PLC
When QA is not received
Peripheral
device
PLC
When R is not received
Response to repeated function code3 secondsFor the internal processing of the 
PLC CPU send RR at least 5 msec 
after receiving QA. 
3...

109
Function codes included in the query
Each function code is 1 byte. When the PLC receives a query (Q), the 
function code of the final response (R) is formed by adding $80 (hex) to 
the function code sent by the query. The value added to the function 
code sent by the query differs for 2-step and 4-step by $20 (hex).
The function code of the R message can be used by the peripheral 
device to verify that the correct Q message has been received by the 
PLC. 
Communication function codes
  $ notes...

110
Cyclic Redundancy Checking (CRC)
The CRC is a 2-byte checksum code attached to the end of the message 
by the sender to check if the communication frame is transmitted 
without error.
The sender calculates the CRC when it sends one-byte message, and 
the receiver should also calculate the CRC from the data of the 
message. Since this CRC calculation takes a long time when writing a 
communication program, you should find any ways to increase the 
speed of this part to avoid errors and improve the...