Diagnostic Bytes From The 2500-Rbc - Control Technology 2500 Series Installation And Operation Manual

These 7 status words give the status for Profibus-DP slaves. Each bit corresponds to a particular
Profibus address, with STW03 Bit 16 being address 1 and STW09 Bit 1 being address 112. Each bit
= 0 if the address is present and operating. The bit = 1 if the address is not present or failed. When
the 2500-RBC loses communication or goes offline due to a mismatch, the corresponding bit for that
address is set = 1.
STW211-STW217
These 7 status words contains the "enable" status of each Profibus address. If the slave is enabled,
the bit = 1. If the slave is disabled, the bit = 0.
STW231 bits 1,2, and 16 indicate the OPERATE, CLEAR, and CONFIGURED state of the Profibus-
DP I/O system.
STW232-STW238 indicate the Profibus-DP slave that have signaled a diagnostic that has not been
read by an RSD instruction. The slave's bit is a 1 if a diagnostic has been signaled and not yet read.

Diagnostic Bytes from the 2500-RBC

When an RSD instruction is executed, the 2500-RBC returns 15 bytes of information which is stored
according to the settings in the RSD instruction. In each byte, bit 7 is the MSB and bit 0 is the LSB.
Byte 1: Station_Status_1
Bit 7 = RBC parameterized from another master (see description of byte 4)
Bit 6 = Parameterization error
Bit 5 = Invalid response from RBC (always set to 0)
Bit 4 = Unsupported function request from RBC
Bit 3 = Extended diagnostics (bytes 7-15) present
Bit 2 = Configuration error
Bit 1 = RBC not ready
Bit 0 = RBC did not respond
Byte 2: Station_Status_2
Bit 7 = RBC is configured but not active (RBC can only set this to 0)
Bit 6 = Reserved
Bit 5 = RBC is operating in SYNCHRONOUS mode
Bit 4 = RBC is operating in FREEZE mode
Bit 3 = Reserved
Bit 2 = Always set to 1
Bit 1 = Always set to 0
Bit 0 = RBC waiting for parameterization
Byte 3: Station_Status_3
Bit 7 = Always set to 0
Bit 6 = Reserved
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CTI 2500-RBC Installation and Operation Guide V1.6