Melec C-VX875, Инструкция по эксплуатации, Страница: 14 / 32

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C-VX875
Instructions Manual
2‑5. AL‑Ⅱ I/O Communication specifications
No. Item Description of specifications
1 AL‑Ⅱ I/O Conformity standard RS485 (Insulation type)
interface
Transmission protocol Protocol for AL‑Ⅱ I/O communication
Application slave ・2CB‑01v1/3232‑MIL (32/32 points)
・2CB‑02v1/1616‑MIL (16/16 points)
Slave connection number A maximum of 4 slave
・C‑VX875 address of AL‑Ⅱ I/O communication
: H'0 fixation
・Slave address setting range
: Within the limits of H' 1〜H' F
Wiring distance/baud rate ・50 m/10 Mbps
・30 m/20 Mbps
2 Reading of slave The slave type connected now can be read. Connected
information confirmation
of slave
3 Reading of error total ・The error total number detected in the AL‑Ⅱ I/O
Error detection
number communication after the power supply is turned on
of AL‑Ⅱ I/O
can be read.
communication
・It is possible to use it for the evaluation of the
communication environment.
・When retrying is detected, it counts as an error.
・The error total number can be counted 65535 times
or less. More than it do not update a count.
Clear of error total number The value in which the error total number is counted can
be cleared to 0.
Retry ・It is a function to evade the stagnation of the entire
system by retrying it when the influence of the noise
etc. is given to AL‑Ⅱ I/O communications.
・The number of retrying is set by an Environment‑set‑
function.
When retrying is made effective and the communication
abnormality is detected, retrying is automatically
executed.
・The setting of retrying is possible by the range from
0 (non‑retry) to 3.
4 Initialize Auto transmission of The master carries out initialization for all slaves
initialization automatically when user carries out an Environment‑set‑
function to a master.
Interlock ・When an Environment‑set‑function is executed from the
application, master executes initialization
(a request) to each slave.
・The slave product of the AL‑Ⅱ series doesn't accept
other requests until the initial‑request sent from
master is received after the power supply is turned
on.
・When other requests are received, an initial error is
returned. As a result, master notifies the application
the answer back.
・When the internal logic on the slave side was reset by
the power failure etc. momentarily, operation by the
improper data can be stopped.
Please execute to master an Environment‑set‑function,
after turning on slave's power supply.
* Refer to the operation manual of 2CB‑01v1/3232‑MIL or 2CB‑02v1/1616‑MIL, about the slave I/O unit
specification of AL‑Ⅱ I/O communication connectable with C‑VX875.