Control and Status Registers
69
Doc.Id. SCM-1200-093
Anybus Communicator for Modbus Plus
Doc.Rev. 3.01
14.2 Status Register Contents (Gateway to Control Sys-
tem)
14.2.1 General Information
The Status Register is (if enabled) located at 0x000-0x001 and constitutes a bit-field as follows:
Note:
Internally, this is treated as a Motorola-format word (i.e. MSB first). If the higher level network
uses a different byte order, the upper and lower bytes will appear swapped.
14.2.2 Status Codes in Master Mode and DF1 Master Mode
(This table is valid only in Master Mode and DF1 Master Mode).
Note:
Conditions of type ‘Error’ will eventually be followed by a ‘No Error’ condition when the cause
has been resolved. Conditions of type ‘Warning’ are however considered informational and may not nec-
essarily be followed by a ‘No Error’ condition later on.
bit(s)
Name
Description
15
Send
(SR_HS_SEND)
These bits control the handshaking towards the fieldbus control system.
See also...
- “Handshaking Procedure” on page 67
- “Control Register Contents (Control System to Gateway)” on page 71
14
Confirm
(SR_HS_CONFIRM)
13
Data Valid
(Master Mode and DF1
Master Mode Only)
This bit is set when all transactions have been executed successfully at least once.
Once set, it will not change.
1:Data Valid
0:Data not Valid
Note:
This bit is not used in Generic Data Mode.
12... 8 Status Code
This field holds the last status report from the gateway.
See also...
- “Status Codes in Master Mode and DF1 Master Mode” on page 69
- “Status Code in Generic Data Mode” on page 70
7... 0
Data
Code Condition
Type
Data
Description
0x00
Retransmission
Counter Updated
Warning
Counter
The number of retransmissions on the subnet-
work has increased. If this problem persists,
this may eventually trigger a Single- or Multi-
ple Node(s) Missing condition.
0x01
Single Node Missing
Error
Slave address
A single node is missing.
0x02
Multiple Nodes Missing Error
Number of nodes Multiple nodes are missing.
0x03
Buffer Overrun
Warning
Slave address
A node returned more data than expected.
0x04
Other Error
Error
Slave address
Undefined error
0x1F
No Error
Warning
-
No errors
Summary of Contents for Communicator Modbus plus
Page 83: ......
