Flowserve DDC-100 Modbus Direct-to-Host - Manual (Page 8)

10 DDC-100 Direct-to-Host Programming Guide FCD LMAIM4019-00 FCD LMAIM4019-00 DDC-100 Direct-to-Host Programming Guide 11
Table 3.4 – Status Bit Definitions (continued)
Bit Number
Modbus
Bit
Address
UEC-3-DDC and DDC-100 Clamshell I/O Module
179 178 Open torque switch User Input 10
180 179 Open limit switch User Input 11
181 180 Close torque switch User Input 12
182 181 Close limit switch User Input 13
183 182 Aux. Open Input User Input 14
184 183 Aux. Close Input User Input 15
185 184 User Input 0 User Input 0
186 185 User Input 1 User Input 1
187 186 User Input 2 User Input 2
188 187 User Input 3 User Input 3
189 188 User Input 4 User Input 4
190 189 User Input 5 User Input 5
191 190 Input 6 User Input 6
192 191 Input 7 User Input 7
193 192 Analog Input 1 lost Analog Input 1 lost
194 193 Analog Input 2 lost Analog Input 2 lost
195 194 Analog Input 3 lost Analog Input 3 lost
196 195 Analog Input 4 lost Analog Input 4 lost
197 196 Network Channels A/B timed out Network Channels A/B timed out
198 197 Reserved Reserved
199 198 Reserved Reserved
200 199 Reserved Reserved
201 200 Reserved Reserved
202 201 Reserved Reserved
203 202 Reserved Reserved
204 203 Reserved Reserved
205 204 Lost Phase Input User Input 18
206 205 Phase Reverse Input User Input 19
207 206 Input 8 User Input 16
208 207 Input 9 User Input 17
Example
Poll field unit number 22 for 16 inputs starting at input 129 with the actuator opening.
Query 1602008000107B09
Response 1602020108CDED
Message Breakdown
Query Response
16 Slave (Field Unit) Address 16 Slave (Field Unit) Address
02 Function 02 Function
00 Starting Address Hi 02 Byte Count
80 Starting Address Lo 01 1 Data (Inputs 10136 - 10129)
00 No. of Points Hi 08 2 Data (Inputs 10144 - 10137)
10 No. of Points Lo CDED Error Check (CRC)
7B09 Error Check (CRC)
Note 1: 01h equals 0000 0001 (actuator open input bit is ON).
Note 2: 08h equals 0000 1000 (actuator Channel B Fail bit is ON).
3.2.3 Modbus Function Code 03 (Read Holding Register)
This function code is used to read the binary contents of holding registers in the DDC-100 Field
Unit. This function code is typically used during the network polling cycle. A network poll should
consist of field unit registers 9 (Status) and 10 (Fault) as a minimum. Holding register 8 should
also be polled when the actuator is configured for the analog feedback option or position control.
See Table 3.5 for a complete listing of the holding registers.