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147
Programless Communications
Section 5-1
• Multi Operation Commands (Bit specification)
The first time, all of the bit specified operation commands within the param-
eters set in the Download Area Setting are issued. Afterwards, only oper-
ation commands for channels which have been changed are issued.
• Stop Operation
Operation is stopped after a series of operations has been completed.
Reducing
Communications
Time
Try the following measures if communications are slow. Communications time
may be reduced depending on the conditions.
Note
The above measures may result in an inability to communicate. It is recom-
mended that a record is kept of the set values when communications are suc-
cessful, to ensure recovery is possible.
Upload Area
Download Area
Memory
0004
Setting Change
Response Bits
Address
Memory
Address
m+0
m+1
m+2
m+4
n+0
n+1
n+2
n+4
Setting Change
Request Bits
Monitor value
Communications
Status
m+3
n+3
ZZZZ
Read Response
Bits
Read Request Bits
0004
PLC
EJ1
HFU
TC4/2
ZZZZ
2. The Operation Command Response
Bits are set by the PLC.
3. The EJ1 repeats the bit specification
parameter read operation.
1. The EJ1 sets the Operation
Command Request Bits.
Operation
Command Code
Executes the
operation
instruction.
Upload Area
Download Area
Memory
0000
Setting Change
Response Bits
Address
Memory
Address
m+0
m+1
m+2
m+4
n+0
n+1
n+2
n+4
Setting Change
Request Bits
Set value
Monitor value
Communications
Status
m+3
n+3
ZZZZ
Read Response
Bits
Read Request Bits
0000
PLC
1. The Operation Command Request
Bits are cleared by the PLC.
2. The EJ1 clears the Operation
Command Response Bits.
Check point
Meaning
Port C Send Wait Time Reduce the setting to reduce the communications wait time,
except when the programless communications protocol is
NT Link (1: N).
Programless Upload/
Download Settings
Reduce the volume of communications data by reducing the
number of set values. This may reduce the communications
time. Review these settings based on system requirements.
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
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