A
I am communicating Gould Modicon PLC 884 using Modbus RTU protocol. I am facing following difficulties in using modbus function codes:
(1) when i am forcing contact of B805 Output module using Modbus function code, the output forces to ON but reset automatically after some moments. Can the output be hold or latched until we send function code for the contact to force OFF?
(2) Is it possible to force the input contacts of B804 modules using modbus function code for simulation purpose?
(3) I want to add one more B804 module, is it possible to configure the 884 controller using Modbus function code for this addition?
(4) which function code is used for reading and writing the logic program from/to the 884 controller and what will be the querry for this purpose?
(5) How we can read or write the internal memory contacts (not external I/O)? which function is used for this purpose?
I will be very thankful, if any body help me for solving my above problems.
(1) when i am forcing contact of B805 Output module using Modbus function code, the output forces to ON but reset automatically after some moments. Can the output be hold or latched until we send function code for the contact to force OFF?
(2) Is it possible to force the input contacts of B804 modules using modbus function code for simulation purpose?
(3) I want to add one more B804 module, is it possible to configure the 884 controller using Modbus function code for this addition?
(4) which function code is used for reading and writing the logic program from/to the 884 controller and what will be the querry for this purpose?
(5) How we can read or write the internal memory contacts (not external I/O)? which function is used for this purpose?
I will be very thankful, if any body help me for solving my above problems.