The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

PP875 3BSE092977R1 Touch screen

The 4-pin DIP switch is used to select the bus protocol and to activate the respective line termination. The bus protocol must be selected only with dead voltage. Modifications are impossible during operation.

If the termination is activated via the DIP switch, external termination resistors must not be plugged into the output connectors. If a termination is activated, the termination of the alternative bus protocol has to be deactivated in any case

The bus address is entered in the P11 parameter (display indication "n"). OFF is displayed if no address has been entered. In the parameter setting mode, a value between 1 and 99 (up to 126 via the VisionBox) can be entered for the address, but the change will not become effective until a restart takes place. During operation and error messages, the current bus address may be seen by pressing the ← key. Bus interruption Modbus The bus module requires at least one query per minute. If there is no query: - safety switch-off if V2 is activated via the bus or - after another minute, switchover to the hardware input "heat request" is done

Profibus 

If the cyclic data stream is interrupted, after a Profibus Watchdog period defined by the master (e.g. 2.5s): - safety switch-off if V2 is activated via the bus or - after another minute, switchover to the hardware input "heat request"Command contents of assigned bits: Bit 0 (heat request) set to 1 by master = heat request. Bit 1 (high power) set to 1 by master = V2 is opened in the states 18 (operation) and 19 (pause4) (parameter 38 is set to value 2). Bit 2 (remote unlocking) set to 1 by master (at least 0.5 s max. 5 s) = MPA is unlocked. Bit 6 (deactivate heat request) set to 1 by master = the bit 0 signal "heat request" is ignored, the automatic gas burner control system does not receive a heat request via the bus. The heat request is only possible via the hardware input. Eight modules are integrated in the enclosed GSD file. Four of them, a module for Basic, Standard and Extended, do not contain any output bytes but only input bytes (information about MPA). Therefore they cannot give any commands to MPA.

Input data is information about the state of the MPA. The input data contain a different number of bytes, depending on the data transfer module used. The lower bytes are always the same, i.e. Basic transfer is included in Standard transfer, Standard transfer in Extended transfer.