Eaton Cutler-Hammer PanelMate Modicon Manual

38 Modicon Communication Driver ManualThe following is the format for a global data bit read from a Operator Station:[GLBL,G00rr bb] or [GLBL, G00rr.bb]rr Operator Station reference number of the register.bb Operator Station reference number of the bit position. The bit positions are numbered from 1 to16, least significant to most significant.Note: An Operator Station cannot directly read or write to another Operator Station.Note: An Operator Station’s most significant bit (MSB) is bit 16 and the Modicon PLC’s mostsignificant bit (MSB) is 1. Refer to the figure below.Unsolicited Writes to the Operator Station with Modbus PlusAn Operator Station can receive unsolicited writes from a Modicon controller provided the OperatorStation and the specified address is referenced in the Operator Station. The Modicon controllerperforms unsolicited writes through the use of the MSTR function block.The Master Function Block consists of 4 main components: the control block, data start, data size, andthe enable input.The Control Block - This block must be configured as follows:4TTTT Operation Type (1 for write)4TTTT+1 Error Status (reported by controller)4TTTT+2 Length4TTTT+3 Slave Device Data Area4TTTT+4 Routing 14TTTT+5 Routing 2 Complete path to the Operator4TTTT+6 Routing 3 Station from controller4TTTT+7 Routing 44TTTT+8 Routing 5Note: The routing address after the Operator Station address should be set to one. Any unusedrouting addresses should be set to zero.