Table of Contents
Advertisement
PCS100 AVC-20 User Manual
10.2.6.1
Download Service Information.
Information useful for the ABB service department such as parameter settings and the event log can be
downloaded. The information is contained within a zip file which can be sent to the ABB factory to assist in
analyzing problems with the product. To download this information:
a.
Click Service Information Download. You will be informed that a service file is being created. Creating a
service file is a five-step process. This may take some time, e.g., five minutes. You will then be informed
that the service information is ready to download.
b. When prompted by your browser, save the file to the relevant location on your device.
10.2.6.2
Update the Product Firmware
Click Firmware Upload, then click Browse and select the software file provided by the ABB factory. The name of
the software file typically starts with a 4-digit number beginning with 7. Once the file has downloaded the system
must be rebooted via parameter 051 System Reboot.
For further information on upgrading software over Ethernet see document 2UCD200000E002_a How to
Upgrade System Software over Ethernet.
10.2.6.3
Make a Change to An Internal Parameter
Enter the factory supplied code to change the required internal parameter. When a correct code is entered the
message "Parameter Write Result = OK" will be displayed. If an incorrect code is entered the message "Sorry,
value entered is not correct" is displayed. This function is the same as parameter 08 Set Parameter.
10.3 Modbus TCP
Modbus TCP connection is provided with PCS100 AVC-20s fitted with the GDM user interface. Connection is via an
Ethernet cable to the Ethernet port on the bottom of the GDM. Read Only access is available to the parameters in
Table 10-1: PCS100 AVC-20 Modbus TCP User Parameters.
Modbus protocol is an open messaging structure developed by Modicon in 1979, used to establish master-slave
(client/server) communication between intelligent devices. It is a de facto standard, truly open and the most
widely used network protocol in the industrial manufacturing environment.
Modbus TCP specification (available from www.modbus-ida.org/specs.php) was developed in 1999, combining
the physical network (Ethernet) with a networking standard (TCP/IP) and a vendor neutral data representation
(Modbus) giving an open, accessible network for exchange of process data.
Modbus TCP basically embeds a Modbus frame into a TCP/IP frame in a simple manner.
10.3.1
Supported Functions
The following Modbus functions are supported:
Function 3 – Read multiple registers
Function 4 – Read input registers
Function 8 – Diagnostic request
The Modbus server has the following characteristics:
Maximum registers per request
Maximum TCP connections
Modbus server port
Refer to section 10.2.2 for network configuration details. There are no additional Modbus TCP specific user
parameters.
10.3.2
Performance
Each user parameter read for registers in Table 10-1 can take up to 300 ms due to the latency of the PCS100
internal communication bus. To improve Modbus client responsiveness (such as for use in SCADA systems), the
Modbus TCP server caches a range of user parameters as specified in Table 10-2.).
16
5
502
85
Advertisement
Table of Contents
