Data Sheet

ManualsBrandsRoboteQ ManualsSerial DC ControllersRoboteQ GDC3660E 60V 3x180A Brushed DC Motor Controller (w/ Ethernet)

timeout error from occurring in the master. The master can next issue a Poll

Program Complete message to determine if processing is completed.

0x06

Slave Device Busy

Specialized use in conjunction with programming commands.

The slave is engaged in processing a long-duration program command. The

master should retransmit the message later when the slave is free..

0x07

Negative

Acknowledge

The slave cannot perform the program function received in the query. This

code is returned for an unsuccessful programming request using function

code 13 or 14 decimal. The master should request diagnostic or error

information from the slave.

0x08

Memory Parity

Error

Specialized use in conjunction with function codes 20 and 21 and reference

type 6, to indicate that the extended file area failed to pass a consistency

check.

The slave attempted to read extended memory or record file, but detected a

parity error in memory. The master can retry the request, but service may

be required on the slave device.

0x0A

Gateway Path

Unavailable

Specialized use in conjunction with gateways, indicates that the gateway

was unable to allocate an internal communication path from the input port

to the output port for processing the request. Usually means the gateway is

misconfigured or overloaded.

0x0B

Gateway Target

Device Failed to

Respond

Specialized use in conjunction with gateways, indicates that no response

was obtained from the target device. Usually means that the device is not

present on the network.

2.2 Supported Modes

Controllers are supporting the following modes:

2.2.1 Modbus RTU over TCP (2)

Simply put, this is a Modbus RTU message transmitted with a TCP/IP wrapper and sent over a network

instead of serial lines.

For examples, to read VAR1, you need to read 2 registers from address 0x20C1 so you need to send the

following RTU message:

01 04 20 C1 00 02 2B F7

Name

Description

Node address

Function code (Read Input Registers)

20 C1

00 02

Length of registers to be read (must be 2)