RKC INSTRUMENT COM-JG, Инструкция по эксплуатации

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5. SETTING
IMR01Y35-E3
18
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Number of continuous accesses (elective setting)
Each module in the controller (SRZ) has multiple channels, and thus in the case of a 4-channel
type Z-TIO module, four data areas (data parameters) must be retained for each communication
item. However, the number of continuous accesses setting can be configured to allow
communication with just one data area (data parameter) per communication item regardless of the
number of channel.
In a static data request, a combined total of up to 40 read and write items can be
communicated.
The factory set value for the number of continuous accesses is “4,” and thus when the
controller (SRZ) configuration consists only of 4-channel type Z-TIO modules, the
setting does not need to be configured.
For information on the number of continuous accesses, refer to also Number of
continuous accesses (P. 65) in 8.4 Contents Check of COM-JG Initial Setting .
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Continuous accesses enable selection (elective setting)
When the communication items of a static data request contain both channel-based data and
module-based data, the number of continuous accesses setting must be disabled for module-based
data
.
When only channel-based data is communicated, this setting is not necessary.
For information on the continuous accesses enable selection, refer to also Continuous
accesses enable selection (P. 66) in 8.4 Contents Check of COM-JG Initial Setting .
•
Static data read range (elective setting)
When a communication item is specified in a static data request, a read or write request is
normally sent to the same Modbus register address of all connected controllers (each module of
the SRZ).
For example, when a Z-TIO module and a Z-DIO module of an SRZ are connected and a
communication item of the Z-TIO module is read, the data of the same Modbus register address
in the Z-DIO module as the communication item specified in the Z-TIO module is read. However,
because the contents of the Modbus register addresses of the Z-TIO module and the Z-DIO
module are different, different data is read from each.
To avoid having unnecessary data read, the range of data that can be communicated for the same
module type can be assigned.
This setting is not necessary when the controller consists only of modules that are the
same type.
For information on the static data read range, refer to also Static data read/write
range (P. 68) in 8.4 Contents Check of COM-JG Initial Setting .
•
Static data write range (elective setting)
Same as the static data read range.
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Transmission wait time of controller communication (elective setting)
This setting is normally not necessary.