■
Execution result code [D2]
Code
Description
Code
Description
H0
Normal end
H4
Transmission timeout
H1
The communication port is being used in the
master communication.
H5
Response reception timeout
H2
The communication port is being used in the
slave communication.
H6
Reception error
H3
The number of master communication
instructions simultaneously used is exceeded.
H7
I/O allocation shortage error
(Note 1)
It occurs when an abnormal telegram is received. When there is a format error in the header of an
individual protocol, the communication discards the received data and a response reception timeout
occurs.
(Note 2)
It occurs when the communication control I/O relays corresponding to the communication port (master
communication clear to send flag, master communication send active flag, master communication
send done result relay)are not allocated as I/O words of the CPU unit in the I/O map. It occurs only
when the number of user connections of ET-LAN is expanded and this instruction is executed
specifying the expanded connections.
(Note 3)
For details of the execution result codes that may be set if a communication error occurs, refer to "Exit
codes when communication error occurs"
■
Sample program
● An MC protocol command (bulk read) is sent from the LAN port of the CPU unit, and data in
the addresses D000100 to D000101 of an external device is read and stored in the data
registers DT300 to DT301 of FP7.
● After it is confirmed that connection 1 is established in master mode (X90) and no
transmissions are currently being executed for the same port (Y90), the RECV instruction is
started.
● The UNITSEL instruction is used to specify a slot number (LAN port: U100) and the
connection number (U1).
● The RECV instruction is executed with the code (H500) that indicates the device type and
the upper address of the partner unit, the lower address (H64=100), the number of data (U2),
and the storage address (DT300) of FP7.
● It is possible to check if a send error occurs by the sent flag (Y70) when the sending flag
(Y90) turns OFF.
R0
R100
UNITSEL U100
U1
RECV.US
DT0
U2
DT300
H500
H64
R100
RECV
execution relay
Communication port settings
S1: CPU LAN port (U100)
S2: Connection 1 (U1)
RECV execution conditions
Clear to send flag: ON
Send active flag: OFF
RECV instruction execution
S1: MC device type (H5)
MC upper address (H00)
S2: MC lower address (H64=100)
n: Amount of received data (U2)
D2: Data storage location (DT300)
D3: Execution result code (DT0)
Master
communication
clear to send flag
X90
Y90
Master
communication
send active flag
(
)
DF
S1
S2
S1
S2
n
D1
D2
Y90
R101
Send result
hold relay
(
)
DF/
Send active flag
<
>
SET
Send result flag
ON in abnormal state/OFF in normal state
Y70
(Note 1)
The above program example holds the send result hold relay (R101). Insert a program that resets the
relay after the relay is checked.
17.40 RECV (MC Protocol Master)
17-204
WUME-FP7CPUPGR-12
Содержание FP7 Series
Страница 2: ... MEMO 2 WUME FP7CPUPGR 12 ...
Страница 18: ... MEMO xviii WUME FP7CPUPGR 12 ...
Страница 52: ... MEMO 1 34 WUME FP7CPUPGR 12 ...
Страница 61: ...Example 2 Use PSHS RDS or POPS instruction 2 1 Structure of Instructions WUME FP7CPUPGR 12 2 9 ...
Страница 104: ... MEMO 2 52 WUME FP7CPUPGR 12 ...
Страница 123: ...3 9 ANS AND stack WUME FP7CPUPGR 12 3 19 ...
Страница 125: ...3 10 ORS OR Stack WUME FP7CPUPGR 12 3 21 ...
Страница 129: ...3 11 PSHS Push stack RDS Read stack POPS Pop stack WUME FP7CPUPGR 12 3 25 ...
Страница 139: ...4 CNDE instruction 5 Step ladder instructions 6 Subroutine instructions 3 16 ALT Alternate out WUME FP7CPUPGR 12 3 35 ...
Страница 146: ... Application example of timer instructions serial connection of timers 3 17 TM Timer 3 42 WUME FP7CPUPGR 12 ...
Страница 147: ... Application example of timer instructions parallel connection of timers 3 17 TM Timer WUME FP7CPUPGR 12 3 43 ...
Страница 190: ...3 26 JP LBL Jump Label 3 86 WUME FP7CPUPGR 12 ...
Страница 239: ...Name Description SR8 ER 3 46 ST ST ST ST ST ST Data Comparison Start WUME FP7CPUPGR 12 3 135 ...
Страница 246: ... MEMO 3 142 WUME FP7CPUPGR 12 ...
Страница 251: ...Name Description SRA Depending on the comparison result SRB SRC 4 1 CMP Data Compare WUME FP7CPUPGR 12 4 5 ...
Страница 258: ... MEMO 4 12 WUME FP7CPUPGR 12 ...
Страница 277: ...F E D C B A 9 8 7 6 5 4 3 2 1 0 Digit 3 Digit 2 Digit 1 Digit 0 bit 5 8 DGT Digit Data Transfer WUME FP7CPUPGR 12 5 19 ...
Страница 304: ... MEMO 5 46 WUME FP7CPUPGR 12 ...
Страница 321: ...Name Description ER 6 7 DIVFP2 Division FP2 Compatible WUME FP7CPUPGR 12 6 17 ...
Страница 348: ... MEMO 6 44 WUME FP7CPUPGR 12 ...
Страница 388: ... MEMO 7 40 WUME FP7CPUPGR 12 ...
Страница 438: ... MEMO 8 50 WUME FP7CPUPGR 12 ...
Страница 450: ... MEMO 9 12 WUME FP7CPUPGR 12 ...
Страница 520: ... MEMO 10 70 WUME FP7CPUPGR 12 ...
Страница 602: ... MEMO 11 82 WUME FP7CPUPGR 12 ...
Страница 622: ... MEMO 12 20 WUME FP7CPUPGR 12 ...
Страница 650: ... MEMO 13 28 WUME FP7CPUPGR 12 ...
Страница 1160: ... MEMO 18 66 WUME FP7CPUPGR 12 ...
Страница 1188: ... MEMO 19 28 WUME FP7CPUPGR 12 ...
Страница 1211: ...20 4 ASCII Code Table JIS8 Code Table Reference Table ASCII Codes 20 4 ASCII Code Table JIS8 Code Table WUME FP7CPUPGR 12 20 23 ...
Страница 1220: ... MEMO WUME FP7CPUPGR 12 ...
Страница 1221: ... MEMO WUME FP7CPUPGR 12 ...