Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 145)

2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual 2-117
10. Auto mode and maual mode:
a) Auto mode (M1351 = On): Master PLC automatically reads/writes from/to Slave PLC and stops when
M1350/M1351 = Off to terminate EASY EASY PLC LINK.
b) Manual mode (M1352 = On): When M1352 = On, you also have to set up the times of polling in D1431. One
time of polling refers to the completion of reading and writing all Slaves. After the EASY PLC LINK is
enabled, D1432 will start to count how many LINKs have been done. When D1431 = D1432, EASY EASY
PLC LINK stops and M1352 is reset. To re-enable EASY EASY PLC LINK in the manual mode, simply turn
“On” M1352 and D1431 will starts to count the times of LINK again.
c) Note:
i) Automatic mode (M1351) and manual mode (M1352) cannot be “On” at the same time; otherwise EASY
EASY PLC LINK will stop and M1350 will be reset.
ii) For EH/EH2/SV: M1350 has to be reset before switching between automatic mode and manual mode. For
SA/SX/SC: No such restriction
iii) The communication timeout is adjustable (D1129, range: 200 ≤ D1129 ≤ 3,000). If D1129 falls out the range,
PLC will determine the time by 200 or 3,000. The timeout setting of EASY EASY PLC LINK is only valid if it is
set before the LINK is enabled. If the number of read/written data >16, the communication timeout shall be >
500ms in case a communication timeout may occur.
iv) EASY EASY PLC LINK is only workable when the baud rate is > 1,200bps. If the baud rate is < 9,600, the
communication timeout setting shall be > 1 second.
v) The communication is unworkable when the number of read/written data = 0.
vi) EASY EASY PLC LINK does not support the reading/writing from/to 32-bit counters (C200 ~ C255).
vii) The maximum set value for D1399 is 230. If the set value is bigger than 230, PLC will automatically correct it
as 230. The minimum set value for D1300 is 1. If the set value is smaller than 1, PLC will automatically
correct it as 1.
viii) Setting up of D1399 has to be done before EASY EASY PLC LINK is enabled. After EASY EASY PLC LINK
is enabled, setting up D1399 will not result in any changes.
ix) Advantages (when using a multi-layer network): Assume you are using a network with 3 layers and the first
and second layer and the second and third layer are using EASY EASY PLC LINK for communication, the
IDs in the second and third layer will definitely overlap due to the old version of EASY PLC LINK detects only
Slave ID#1 ~ 16. When the IDs of Slave and Master overlap, EASY PLC LINK will ignore the PLC of
overlapping ID, resulting in the situation that the third layer can have only 15 PLCs. Therefore, D1399 allows
more PLCs connected in a multi-layer network.