Control and Status Registers
13-3
Status Register Contents (Gateway to Control System)
General Information
As mentioned previously, the Status Register indicates the current status of the gateway towards the
fieldbus control system.
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.
Status Codes in Master Mode
(This table is valid only in 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...
- 13-1 “Handshaking Procedure”
- 13-5 “Control Register Contents (Control System to Gateway)”
14
Confirm
(SR_HS_CONFIRM)
13
Data Valid
(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...
- 13-3 “Status Codes in Master Mode”
- 13-4 “Status Code in Generic Data Mode”
7... 0
Data
Code Condition
Type
Data
Description
0x00
Re-transmission
Counter Updated
Warning
Counter
The number of re-transmissions on the sub-
network has increased. If this problem per-
sists, this may eventually trigger a Single- or
Multiple 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
