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| Register (Decimal) | Description | Data format | |--------------------|-------------|--------------| | 40001 (0x0000) | Firmware version read-only → returns 0x0100 for Ver 1.0 | uint16 | | 40002–40017 | AI0 raw value (0–65535) through AI15 raw value | uint16 | | 40018–40021 | AO0–AO3 raw value (write 0–16383) | uint16 | | 40022 | Digital input status: bit0=DI0, bit1=DI1 | bitmask | | 40023 | Digital output control: bit0=DO0, bit1=DO1 | bitmask | | 40100 | System status: bit7=over-temperature, bit6=24V low | bitmask |
Document ID: MS-7826-V1.0-ENG Firmware Baseline: Version 1.0 Product Series: MS 7800 Industrial Control Series Introduction The MS 7826 Ver 1.0 is a specialized industrial control module, typically found in automated manufacturing environments, legacy PLC (Programmable Logic Controller) systems, or precision instrumentation racks. The "MS" designation often points to a Measurement Systems or Master Slave controller, while the 7826 model number identifies a 24-channel mixed I/O unit with isolated analog inputs. ms 7826 ver 1.0 manual
| Switch (SW1) Position | Function (Ver 1.0) | |------------------------|---------------------| | 1–4 | Binary address (ON=1, OFF=0) Example: Switch 1 ON = +1, Switch 2 ON = +2, etc. | | 5 | ON = RS-485, OFF = RS-232 | | 6 | ON = 19200 baud, OFF = 9600 baud | | 7 | ON = No parity, OFF = Even parity | | 8 | ON = 2 stop bits, OFF = 1 stop bit | Cycle power after changing DIP switches. Ver 1.0 does NOT support software-overridden DIP settings. 3.2 Modbus Register Map (Ver 1.0 Only) The manual lists the following key addresses (holding registers, function code 0x03/0x06): | Register (Decimal) | Description | Data format
For archival purposes, preserve a physical copy of the MS 7826 Ver 1.0 manual inside your control cabinet, as digital scans often omit the critical trimmer calibration maps and timing diagrams. | | 5 | ON = RS-485, OFF