1 block write command format, 2 block read command format – Rice Lake Allen-Bradley Remote I/O User Manual

920i Programmable HMI Indicator/Controller - Remote I/O Indicator Interface, 820i Programmable Indicator/Controller - Remote I/O Indicator Interface Installation and Programming Manual, 720i Programmable Indicator/Controller - Remote I/O Indicator Interface Installation and Programming Manual, 520 Configurable Weight Indicator - Remote I/O Indicator Interface Installation and Programming Manual