Chapter6 Communication Mode
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6.2.3
Initial setting
When the power is turned on, the EH-SIO will be in idling state (waiting for initial setting from CPU module).
After the initial setting from the CPU module, operation in free protocol mode begins. Once initial setting is
completed, the setup cannot be changed unless CPU module is stopped or EH-SIO is reset.
« Note »
When there is no initial setting, EH-SIO will not receive any other data from CPU module and external device than
initializing command.
Parameters required for initial setting
Table 6.1 Parameter table for initialization
No.
Parameter
Contents
1
Communication mode
(Indispensable)
Operation after initial setting depends on chosen communication modes of EH-SIO.
Please specify the parameter corresponding to free protocol mode.
2
Message composition
(Indispensable)
Configuration of the data sent and received.
There are ten types of combinations. Please specify the parameter corresponding to the
message composition to be used.
If message composition is registered, a start character, stop character, and check code
will be automatically added or deleted by EH-SIO.
Modem line control
(Indispensable)
When RS-232C port is connected with a modem and communicating, the state of a
control signal (RS, ER) can be switched by the user program. Also, as the control
signal can be turned on, please choose according to use.
* For RS-422/485 port, this setup cannot be used.
Data conversion type
(Indispensable)
EH-SIO has a function which changes the character transmitted from CPU module and
sent it, and a function which changes the character of receiving data and passes it to
CPU module.
The following are the three types of conversion types supported:
1) CPU
EH-SIO
Through (no change)
2) CPU(Binary)
EH-SIO(ASCII)
Binary
ASCII Conversion
3) CPU(Binary)
EH-SIO(Binary)
Binary through
3
Start character
(Optional)
When the message composition has a start character, a start character (max. 2 byte) is
recommended to be specified.
Only one type of start character can be registered.
4
Stop character
(Optional)
When the message composition has a stop character, a stop character (max. 2 byte) is
recommended to be specified.
Only one type of stop character can be registered.
5
Check code calculation
type
(Optional)
When the Message composition has check codes (BCC, sum, etc.), the calculation type
of a check code is recommended to be specified.
When the check code by the calculation type which is not supported by EH-SIO is
required, please choose message composition without a check code and calculate by
the user program.
6
Receiving timeout
(Optional)
When timeout is specified, EH-SIO will receive timeout error in the following cases:
1) When there is no response from external device after specified time passes.
2) When data receiving is not completed within the specified time.
Please set this parameter to check for receiving a timeout by EH-SIO in the case of
receiving after sent.
7
Data interval time
(Optional)
When performing data receiving without specification of a stop character, EH-SIO
detects the end of data by the time of no data. This period is called the data interval.
When the end of the message composition does not have a stop character, this
parameter needs to be set. (If not specified, 100ms is the default.)
Summary of Contents for EH-150 Series
Page 2: ......
Page 10: ...M E M O ...
Page 30: ...Chapter 4 Installation 4 10 M E M O ...
Page 156: ...Chapter 7 System setup 7 12 M E M O ...
Page 164: ...Chapter 8 Daily and Periodic Inspection 8 8 M E M O ...
