janitza UMG 508, Handbook

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UMG 508
4 UMG 508
5
General General
Modbus
Modbus functions (master)
As a master, the UMG508 supports the following modbus functions;
01 Read Coil Status
Reads the ON/OFF status of discrete outputs (0X references, coils) in the slave. Broadcast is not supported.
02 Read Input Status
Reads the ON/OFF status of discrete inputs (0X references) in the slave. Broadcast is not supported.
03 Read Holding Registers
Reads the binary contents of holding registers (4X references) in the slave.
04 Read Input Registers
Reads the binary contents of input registers (3X references) in the slave.
05 Force Single Coil
Forces a single coil (0X references) to either ON or OFF. When broadcast, the function forces the same coil reference in all
attached slaves.
06 Preset Single Register
Presets a value into a single holding register (4X reference). When broadcast, the function presets the same register reference
in all attached slaves.
15 (0F Hex) Force Multiple Coils
Forces each coil (0X references) in a sequence of coils to either ON or OFF. When broadcast, the function forces the same
coil reference in all attached slaves.
16 (10Hex) Preset Multiple Registers
Presets values into a sequence of holding registers (4X references). When broadcast, the function presets the same register
references in all attached slaves.
23 (17Hex) Read/Write 4X Registers
Performs a combination of one read and one write operation in a single Modbus transaction. The function can write new
contents to a group of 4XXXX registers, and then return the contents of another group of 4XXXX registers. Broadcast is not
supported.
Modbus Functions (Slave)
As a slave, the UMG508 supports the following modbus functions:
03 Read Holding Registers
Reads the binary contents of holding registers (4X references) in the slave.
04 Read Input Registers
Reads the binary contents of input registers (3X references) in the slave.
06 Preset Single Register
Presets a value into a single holding register (4X reference). When broadcast, the function presets the same register reference
in all attached slaves.
16 (10Hex) Preset Multiple Registers
Presets values into a sequence of holding registers (4X references). When broadcast, the function presets the same register
references in all attached slaves.
23 (17Hex) Read/Write 4X Registers
Performs a combination of one read and one write operation in a single Modbus transaction. The function can write new
contents to a group of 4XXXX registers, and then return the contents of another group of 4XXXX registers. Broadcast is not
supported.