2. Prog rammi ng Con cep ts
M N050 03003E F or m ore info rm ati on vi sit:
www.eaton.co m
2-135
7.
Master ELC will read/write to slave ELC in order, i.e. it will read/write to the next slave after
finishing a slave.
Automatic / Manual mode explanation:
1.
Auto mode (M1351): when M1351 = ON, Master ELC will access slave ELCs as the operation
described above, and stop the polling till M1350 or M1351 is OFF.
2.
Manual mode (M1352): When manual mode is selected, times of polling cycle in D1431 has
to be set up. A full polling cycle refers to the completion of accessing all Slaves. When ELC
LINK is enabled, D1432 starts to store the times of polling. When D1431 = D1432, ELC LINK
stops and M1352 is reset. When M1352 is set ON again, the ELC will start the polling
according to times set in D1431 automatically.
Note:
1.
Auto mode M1351 and manual mode M1352 cannot be enabled at the same time. If M1351 is
enabled after M1352 is ON, ELC LINK will stop and M1350 will be reset.
2.
Communication timeout setting can be modified by D1129 with available range 200
≦
D1129
≦
3000. The ELC will take the upper / lower bound value as the set value if the specified
value is out of the available range. D1129 has to be set up before M1350 = ON.
3.
ELC LINK function is only valid when baud rate is higher than 1200 bps. When baud rate is
less than 9600 bps, please set communication time-out to more than 1 second.
4.
The communication is invalid when data length to be accessed is set to 0.
5.
Access on 32-bit high speed counters (C200~C255) is not supported.
6.
Available range for D1399: 1 ~ 230. The ELC will take the upper / lower bound value as the
set value if the specified value exceeds the available range.
7.
D1399 has to be set up before enabling ELC LINK. Setting up this register during ELC LINK
execution will not take effect.
8.
Advantage of using D1399 (Designating the ID of starting Slave): In old version ELC LINK,
The ELC detects Slaves from ID1 to ID16. Therefore, when ELC LINK is applied in multi-
layer networks, e.g. 3 layers of networks, the Slave ID of 2
nd
and 3
rd
layer will be repeated.
When Slave ID is repeated, i.e. the same as Master ID, the Slave will be passed. In this case,
only 15 Slaves can be connected in 3
rd
layer. To solve this problem, D1399 can be applied for
increasing the connectable Slaves in multi-layer network structure.
Содержание ELC-PB
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