Features
* 1 NO/NC reserved contact
* ON/OFF control
* output status
* timer control options:
– delayed activation
– delayed activation for a preset time
– cyclic operation ON / OFF
– cyclic operation OFF / ON
* status memory status after power failure
* automatic start for time function
* last output switching time
* number of output switching
* number of cycles executed for time functions
Operation
The MR-RO-1 module is equipped with a controllable relay output (reserved contact). The output operates according to the preset operating mode and the parameters assigned to it. Setting and reading of the output status, operating parameters and all communication and data exchange parameters are carried out via the RS-485 port using the MODBUS RTU communication protocol. Power is indicated by the green LED U light. Correct data exchange between the module and the other device is indicated by the yellow LED Tx light.
OPERATING MODES
0. ON/OFF
Default module operating mode where the output is directly turned on and off using commands sent via Modbus.
1. Delayed activation
After receiving the ON command, the controller measures the time set in parameter T1 and activates the relay. After receiving the OFF command, the relay will close. Sending the OFF command during the T1 time countdown will cancel the cycle. Another ON command received at time T1 or when the relay is already open will be ignored.
2. Activation for a preset time
The relay is activated after receiving the ON command and is deactivated when the preset time has elapsed. The next cycle can be started by sending the next ON command. Sending the OFF command turns the relay off. The ON command received during the T1 time will be ignored.
3. Delayed activation for a preset time,
After receiving the ON command, the module starts measuring the time T1 and then closes the relay for the time T2, after which the relay closes. After the previous cycle is completed, the next cycle can be activated by sending another ON command. Sending the OFF command stops the execution of the cycle and closes the relay. The received ON command will be ignored while the cycle is being executed.
4. OFF/ON cycle
Cyclic operations are OUT OFF (relay closed) for time T1 and OUT ON (relay open) for time T2. The cycle is started by sending the ON command. The number of cycles executed depends on the value of register 0x235. If this register is set to 0, the program is executed cyclically until the OFF command is sent. If this register value is non-zero (max. 65 535), the controller performs a predetermined number of cycles and then shuts down. Sending the OFF command during the cycle stops the execution of the cycle and closes the relay. The ON command received during the execution of the cycle is ignored. After the programmed number of cycles, the next ON command will start the program from the beginning.
5. ON/OFF cycle
Cyclic operations are OUT ON (relay on) for time T1 and OUT OFF (relay off) for time T2. The cycle is started by sending the ON command. The number of cycles executed depends on the 0x235 register value. If this register is set to 0, the program will be executed cyclically until the OFF command is sent. If this register value is non-zero (max. 65 535), the controller performs a predetermined number of cycles and then shuts down. Sending an OFF command during a cycle stops the execution of the cycle and closes the relay. An ON command received during a cycle is ignored. After the programmed number of cycles, the next ON command restarts the program.
STATE MEMORY AND AUTOMATIC START
The active state memory restores the state of the program to the state before the power failure when the power is turned back on. For mode 0, the state memory sets the contact to the position before the power failure. Setting the state memory for modes 1-5
